Buffer overflow in Mozilla Firefox and Firefox for Android - CVE-2026-8973
Published: May 19, 2026
Vulnerability identifier: #VU131863
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-8973
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Firefox for Android
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to memory corruption in multiple components when processing web content. A remote attacker can trigger the flaws to execute arbitrary code.
Some of the bugs showed evidence of memory corruption.
How to mitigate CVE-2026-8973
Install security update from vendor's website.
Sources
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-46/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1362365
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1860538
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1929005
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1983353
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1998526
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2023271
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2023943
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024244
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024260
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024443
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024665
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024774
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2024916
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025346
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025357
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025406
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025434
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025488
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025496
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025942
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025947
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025968
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2026279
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027159
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027239
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027276
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027308
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027310
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027324
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027329
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027363
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027381
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027382
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027383
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028274
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2028884
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029060
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029065
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029068
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029281
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029293
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029297
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029303
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029439
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029448
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029703
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029720
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029721
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029723
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029770
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029771
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029782
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029818
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029885
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2030100
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2030379
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2030385
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2030979
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2031119
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2031122
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2034119
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2034791
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2035209
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2036666
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2037986