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CVE-2026-42530

A flaw was found in the ngx_http_v3_module module of NGINX. When NGINX is configured to use the HTTP/3 QUIC module, an attacker can use a specially crafted HTTP/3 session to reopen a QPACK encoder stream and cause a use-after-free issue, potentially allowing code execution or a denial of service by forcing the process to restart.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d7919e9aec2203a709000be325497d91e82f632c92fe3eb2d4917a4026740145
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 9 assertions

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:insights_proxy:1"],"defaultStatus":"unaffected","packageName":"insights-proxy/insights-proxy-container-rhel9","product":"Red Hat Lightspeed proxy 1","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/7

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"nginx:1.26/nginx","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/6

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"nginx-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1.30.2-1.hum1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/0

{"defaultStatus":"unknown","modules":["ngx_http_v3_module"],"product":"NGINX Open Source","vendor":"F5","versions":[{"lessThan":"1.31.2","status":"affected","version":"1.31.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"nginx:1.24/nginx","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"nginx:1.24/nginx","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/5

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/4
cvss · 3 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/metrics/0/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-416","description":"Use After Free","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

9 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"nginx","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:insights_proxy:1"],"defaultStatus":"unaffected","packageName":"insights-proxy/insights-proxy-container-rhel9","product":"Red Hat Lightspeed proxy 1","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/7
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"nginx:1.26/nginx","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/6
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"nginx","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"nginx-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1.30.2-1.hum1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/0
{"defaultStatus":"unknown","modules":["ngx_http_v3_module"],"product":"NGINX Open Source","vendor":"F5","versions":[{"lessThan":"1.31.2","status":"affected","version":"1.31.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"nginx:1.24/nginx","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"nginx:1.24/nginx","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"nginx","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/affected/4

Provider-owned CVSS observations

3 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-416","description":"Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20351"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-42530"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/references/0
{"name":"RHBZ#2489872","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2489872"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/references/1
{"tags":["vendor-advisory"],"url":"https://my.f5.com/manage/s/article/K000161616"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42530.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50de81e66e560dfc71b5318272c21acf721e771f3a1dbffa9aac3da94eca9ee8 · sha256:282909de49d938c3… · /containers/adp/1/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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