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CVE-2026-6104

In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL byte is passed to mb_convert_encoding() or related mbstring functions, the code incorrectly assumes that when strncasecmp() returns 0 it means the strings have the same length. This can lead to out-of-bounds read of global memory, potentially causing a crash or information disclosure or crash. Affected functions include mb_convert_encoding(), mb_detect_encoding(), mb_convert_variables(),
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ca295c1ad2446b4d3f5e85e6fc942007027422c851f3c30cd285f247b2d4e644
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 11 assertions

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/1

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/6

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"php:8.2/php","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"php:7.4/php","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"php8.4","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.4.21-1.el10_2","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"php:8.3/php","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/8

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"php:8.2/php","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/7

{"defaultStatus":"unaffected","packageName":"mbstring","product":"PHP","vendor":"PHP Group","versions":[{"lessThan":"8.4.21","status":"affected","version":"8.4.*","versionType":"semver"},{"lessThan":"8.5.6","status":"affected","version":"8.5.*","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"unaffected","packageName":"php","product":"Red Hat Hardened Images","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/9

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/2
cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:L/SI:N/SA:L/RE:M/U:Amber","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentiality…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/metrics/1/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-125","description":"Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

11 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"php","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"php","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/6
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"php:8.2/php","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"php:7.4/php","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"php8.4","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.4.21-1.el10_2","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"php:8.3/php","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/8
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"php","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"php:8.2/php","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/7
{"defaultStatus":"unaffected","packageName":"mbstring","product":"PHP","vendor":"PHP Group","versions":[{"lessThan":"8.4.21","status":"affected","version":"8.4.*","versionType":"semver"},{"lessThan":"8.5.6","status":"affected","version":"8.5.*","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"unaffected","packageName":"php","product":"Red Hat Hardened Images","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/9
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"php","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/affected/2

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:L/SI:N/SA:L/RE:M/U:Amber","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentiality…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/metrics/1/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-125","description":"Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /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-2026:22649"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-6104"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/references/0
{"name":"RHBZ#2468573","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2468573"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/adp/1/references/1
{"tags":["vendor-advisory"],"url":"https://github.com/php/php-src/security/advisories/GHSA-74r9-qxhc-fx53"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6104.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1680f9ede8a871b9d54db8e520ca9c989c6f2d9bda13ca61e513ec58034d543f · sha256:39263b6203920426… · /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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