CVE-2026-8973

high
Published 2026-05-19 · Modified 2026-05-26
CVSS v3
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2
VIR risk
8.8

Description

Memory safety bugs present in Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Predictions

Exploit likelihood
92%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-8973.html

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-8973

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-50/

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-46/

OS impact

OSVersionStatusFixed in
debian debiansidfixed151.0-1
suse slesaffected

Application impact

VendorProductVersionsFixed
mozillafirefox{"endExcluding":"151.0.0"}151.0.0
mozillathunderbird{"endExcluding":"151.0.0"}151.0.0

References

CWEs

CWE-119

Verify integrity in audit chain (admin only). AS-IS.