# CVE-2026-92012

## Summary

- **CVE ID:** CVE-2026-92012
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 16, 2026

## Description

Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.

## Affected Products

- Mozilla — Firefox (115.41)
- Mozilla — Firefox (140.16)
- Mozilla — Firefox (153.3)
- Mozilla — Firefox (156)
- Mozilla — Thunderbird (140.16)
- Mozilla — Thunderbird (156)
- Mozilla — Thunderbird (153.3)

## References

- [CNA](https://bugzilla.mozilla.org/show_bug.cgi?id=2058069)
- [CNA](https://www.mozilla.org/security/advisories/mfsa2026-90/)
- [CNA](https://www.mozilla.org/security/advisories/mfsa2026-91/)
- [CNA](https://www.mozilla.org/security/advisories/mfsa2026-92/)
- [CNA](https://www.mozilla.org/security/advisories/mfsa2026-93/)
- [CNA](https://www.mozilla.org/security/advisories/mfsa2026-94/)
- [CNA](https://www.mozilla.org/security/advisories/mfsa2026-95/)
- [CNA](https://www.mozilla.org/security/advisories/mfsa2026-96/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.27%
- **EPSS Percentile:** 19.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._