Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2022-26486

CVE-2022-26486CRITICAL

Mozilla Firefox

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  C  H  H  H    9.6   .0235   83.1   YES

AFFECTED
  Product              Versions       Fixed
  Firefox              unspecified –  —
  Firefox ESR          unspecified –  —
  Firefox for Android  unspecified –  —
  Thunderbird          unspecified –  —
  Focus                unspecified –  —

TIMELINE
  Mar 4   Reserved by mozilla
  Mar 7   Added to CISA KEV, remediation due 2022-03-21
  Dec 22  Published (CNA: mozilla)
  Aug 19  EXPLOIT PUBLISHED — CVE-2022-26486 (Mozilla Firefox). Public exploit reference added.

CWE-416 · CNA: mozilla · CVSS v3.1 · 3 references · NVD status: Analyzed · KEV due March 21, 2022

Description

An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
March 4, 2022	Reserved	Reserved by mozilla
March 7, 2022	KEV ADDED	Added to CISA KEV, remediation due 2022-03-21
December 22, 2022	Published	Published (CNA: mozilla)
August 19, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-26486 (Mozilla Firefox). Public exploit reference added.

Affected

Affected products and packages — 5 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Mozilla	Firefox	—	unspecified	—
Mozilla	Firefox ESR	—	unspecified	—
Mozilla	Firefox for Android	—	unspecified	—
Mozilla	Thunderbird	—	unspecified	—
Mozilla	Focus	—	unspecified	—

Weaknesses

CWE-416

References (3)

https://bugzilla.mozilla.org/show_bug.cgi?id=1758070 [Exploit, Issue Tracking, Vendor Advisory]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26486 [US Government Resource]
https://www.mozilla.org/security/advisories/mfsa2022-09/ [Exploit, Vendor Advisory]

Authoritative record: CVE-2022-26486 at cve.org

Vendors: mozilla

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-26486 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.