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Vulnerabilities

Vulnerability · CVE-2026-118004

Incorrect boundary conditions in the CSS Transitions and Animations component.

Published Oct 27, 2026 · catalog updated Oct 28, 2026 · Mozilla Firefox

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-118004. EPSS is 0.18%. Act only if a listed version of Mozilla Firefox is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.18%
Remediation
Advisory link
Affected products
Debian:12 firefox-esr · Debian:12 thunderbird · Debian:13 firefox-esr · Debian:13 thunderbird · Debian:14 firefox-esr · Debian:14 thunderbird

Incorrect boundary conditions in the CSS Transitions and Animations component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 firefox-esr102.11.0esr-1, 102.12.0esr-1, 102.12.0esr-1~deb10u1
  • Debian:12 thunderbird1:102.11.0-1, 1:102.12.0-1, 1:102.12.0-1~deb10u1
  • Debian:13 firefox-esr128.13.0esr-1, 128.14.0esr-1, 128.14.0esr-1~deb11u1
  • Debian:13 thunderbird1:128.13.0esr-1, 1:128.14.0esr-1, 1:128.14.0esr-1~deb11u1
  • Debian:14 firefox-esr128.13.0esr-1, 128.14.0esr-1, 128.14.0esr-1~deb11u1
  • Debian:14 thunderbird1:128.13.0esr-1, 1:128.14.0esr-1, 1:128.14.0esr-1~deb11u1
  • vendor Mozilla Firefoxversion unspecified
  • vendor Mozilla Thunderbirdversion unspecified

How to fix CVE-2026-118004

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-118004. EPSS is 0.18%. Act only if a listed version of Mozilla Firefox is installed.

Which versions are affected?

Compare what you have installed with 102.11.0esr-1, 102.12.0esr-1, 102.12.0esr-1~deb10u1, 1:102.11.0-1, 1:102.12.0-1, 1:102.12.0-1~deb10u1, 128.13.0esr-1, 128.14.0esr-1, 128.14.0esr-1~deb11u1, 1:128.13.0esr-1, 1:128.14.0esr-1, 1:128.14.0esr-1~deb11u1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.18%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 27, 2026 · OpenCVE

    Detected

    CVE-2026-118004 is named on the public OpenCVE page.

  2. Oct 28, 2026 · Trivy Vulnerability DB

    Updated

    Incorrect boundary conditions in the CSS Transitions and Animations component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Sources

  • CVE.orgVulnerability recordCVE-2026-118004

    Incorrect boundary conditions in the CSS Transitions and Animations component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-118004

    30-day exploitation probability 0.18%

    first.org
  • OpenCVEVendor advisoryCVE-2026-118004

    CVE-2026-118004 is named on the public OpenCVE page.

    opencve.io
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-118004

    Incorrect boundary conditions in the CSS Transitions and Animations component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

    osv.dev

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • CVE.orgOct 28, 2026
  • Trivy Vulnerability DBOct 28, 2026
  • OpenCVEOct 27, 2026