CVE-2026-4686 (GCVE-0-2026-4686)

Vulnerability from cvelistv5 – Published: 2026-03-24 12:30 – Updated: 2026-06-30 03:18
VLAI
Title
Incorrect boundary conditions in the Graphics: Canvas2D component
Summary
Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
  • CWE-787 - Out-of-bounds Write
Assigner
References
URL Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2016351
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://access.redhat.com/security/cve/CVE-2026-4686 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2450734 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:8427 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7843 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8315 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5931 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6342 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5932 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6917 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7840 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8285 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7858 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8850 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7842 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8289 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7838 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8288 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7839 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8286 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7841 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8287 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7845 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8290 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7837 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8284 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5930 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6188 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
Mozilla Firefox Unaffected: 115.34 , ≤ 115.* (rpm)
Unaffected: 140.9 , ≤ 140.* (rpm)
Unaffected: 149 , ≤ * (rpm)
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Mozilla Thunderbird Unaffected: 140.9 , ≤ 140.* (rpm)
Unaffected: 149 , ≤ * (rpm)
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Red Hat Red Hat Enterprise Linux Server (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.1
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Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v. 8.2)     cpe:/a:redhat:rhel_aus:8.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.4)     cpe:/a:redhat:rhel_aus:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)     cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.6)     cpe:/a:redhat:rhel_aus:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.6)     cpe:/a:redhat:rhel_e4s:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.6)     cpe:/a:redhat:rhel_tus:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.8)     cpe:/a:redhat:rhel_e4s:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.8)     cpe:/a:redhat:rhel_tus:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.0)     cpe:/a:redhat:rhel_e4s:9.0::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Credits
Sajeeb Lohani
Show details on NVD website

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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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