PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-92037 Mozilla CVE debrief

A critical vulnerability was found in the DOM: Animation component of Firefox and Thunderbird, which could lead to high impact attacks if left unpatched. This issue was fixed in Firefox 156 and Thunderbird 156. Defenders should assess exposure and apply patches to prevent potential attacks. The vulnerability has a high CVSS score of 9.8, indicating a critical severity level. It is essential to review system configurations and update to the latest versions to mitigate potential risks. The vulnerability was reported by [email protected], and details on the exact nature of the boundary conditions issue are limited.

Vendor
Mozilla
Product
Firefox
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-15
Original CVE updated
2026-09-21
Advisory published
2026-09-15
Advisory updated
2026-09-21

Who should care

Defenders responsible for managing Firefox and Thunderbird deployments should assess exposure and apply patches to prevent potential high impact attacks. Additionally, security teams and vulnerability management teams should review system configurations and update to the latest versions to mitigate potential risks. Operators and administrators of Firefox and Thunderbird should also be aware of the vulnerability and

Why it matters

A critical vulnerability was found in the DOM: Animation component, which could lead to high impact attacks if left unpatched. Defenders responsible for managing Firefox and Thunderbird deployments should assess exposure and apply patches.

  • Potential for high impact attacks if left unpatched
  • Need for verification and application of patches

Technical summary

The DOM: Animation component in Firefox and Thunderbird has a boundary conditions issue, which could lead to high impact attacks if exploited. The vulnerability was fixed in Firefox 156 and Thunderbird 156. The issue has a high CVSS score of 9.8, indicating a critical severity level. Defenders should prioritize verifying and applying patches for Firefox and Thunderbird to prevent potential attacks. The vulnerability was reported by [email protected], and further details can be found in the official CVE record and NVD vulnerability detail page.

Defensive priority

Defenders should prioritize verifying and applying the patches for Firefox and Thunderbird, as the vulnerability has a high CVSS score of 9.8.

Recommended defensive actions

  • Verify and apply patches for Firefox and Thunderbird
  • Monitor for potential exploitation attempts
  • Review system configurations and update to the latest versions

Evidence notes

The vulnerability was reported by [email protected] and fixed in Firefox 156 and Thunderbird 156. However, details on the exact nature of the boundary conditions issue are limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-92037 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-92037

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-92037 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-92037

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.