How severe is CVE-2022-26486?

CVE-2022-26486 has a CVSS 3.1 base score of 9.6 (CRITICAL). EPSS estimates a 2.3% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2022-26486: Mozilla Firefox Use-After-Free

CISA Known Exploited Vulnerabilities

Mozilla Firefox Use-After-Free Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2022-03-07

Remediation due

2022-03-21

Required action
Apply updates per vendor instructions.

CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2022-26486

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.

Severity

CVSS 3.1 · CISA9.6 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Mozilla	Firefox	unspecified to <97.0.2
Mozilla	Firefox ESR	unspecified to <91.6.1
Mozilla	Firefox for Android	unspecified to <97.3.0
Mozilla	Thunderbird	unspecified to <91.6.2
Mozilla	Focus	unspecified to <97.3.0

References

2 Links

Other references

Record Details

Published

2022-12-22

Last updated

2025-10-21

Assigner (CNA)

mozilla

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.