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CVE-2026-8973

Memory safety bugs present in Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ee069db21740c544635a0ca53460417581b5de93e1dc65b686c046391c457a31
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 14 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"rhel10/thunderbird-flatpak","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"rhel10/firefox-flatpak","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/11

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/10

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/8

{"product":"Firefox","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"151","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/7

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/9

{"product":"Thunderbird","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"151","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/cna/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/6

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/5
cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/metrics/1/cvssV3_1

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/0/metrics/0/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-119","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/0/problemTypes/0/descriptions/0

{"cweId":"CWE-787","description":"Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

14 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"rhel10/thunderbird-flatpak","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"rhel10/firefox-flatpak","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/11
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/10
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/8
{"product":"Firefox","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"151","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/7
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/9
{"product":"Thunderbird","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"151","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/cna/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"firefox","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/6
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"thunderbird","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/affected/5

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-119","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/0/problemTypes/0/descriptions/0
{"cweId":"CWE-787","description":"Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

6 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-8973"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/references/0
{"name":"Memory safety bugs fixed in Firefox 151","url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1362365%2C1860538%2C1929005%2C1983353%2C1998526%2C2023271%2C2023943%2C2024244%2C2024260%2C2024443%2C2024665%2C2024774%2C2024916%2C2025346%2C2025357%2C2025406%2C2025434%2C2025488%2C2025496%2C2025942%2C2025947%2C2025968%2C2026279%2C2027159%2C2027239%2C2027276%2C2027308%2C2027310%2C2027324%2C2027329%2C2027363%2C2027381%2C2027382%2C2027383%2C2028274%2C2028884%2C2029060%2C2029065%2C2029068%2C2029281%2C2029293%2C2029297%2C2029303%2C2029439%2C2029448%2C2029703%2C2029720%2C2029721%2C2029723%2C20297…
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/cna/references/0
{"name":"RHBZ#2479864","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479864"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/references/1
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8973.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/adp/1/references/2
{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/cna/references/1
{"url":"https://www.mozilla.org/security/advisories/mfsa2026-50/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b526bb903191c69cd1022d11ebd19d97c06539a4f2e4d0a0c715c677e053933 · sha256:ab9917aea6aaf2ff… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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