CVE-2026-74943: Use-after-free in the Graphics: ImageLib component
Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 140.14 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 154 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 115.39 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.1 - Upgrade
Upgrade
Mozilla Firefoxto a version that resolves this vulnerability.Fixed in 154 - Upgrade
Upgrade
Mozilla Firefox ESRto a version that resolves this vulnerability.Fixed in 115.39 - Upgrade
Upgrade
Mozilla Firefox ESRto a version that resolves this vulnerability.Fixed in 140.14 - Upgrade
Upgrade
Mozilla Firefox ESRto a version that resolves this vulnerability.Fixed in 153.1
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-74934
- CVE-2026-74935
- CVE-2026-74936
- CVE-2026-74939
- CVE-2026-74940
- CVE-2026-74941
- CVE-2026-74942
- CVE-2026-74943
- CVE-2026-74944
- CVE-2026-74945
- CVE-2026-74946
- CVE-2026-74948
- CVE-2026-74949
- CVE-2026-74953
- CVE-2026-74957
- CVE-2026-74959
- CVE-2026-74960
- CVE-2026-74962
- CVE-2026-74963
- CVE-2026-74964
- CVE-2026-74965
- CVE-2026-74967
- CVE-2026-74969
- CVE-2026-74971
- CVE-2026-74972
- CVE-2026-74973
- CVE-2026-74974
- CVE-2026-74976
- CVE-2026-74983
- CVE-2026-74987
- CVE-2026-74990
- CVE-2026-75874
- CVE-2026-74937
- CVE-2026-74938
- CVE-2026-74947
- CVE-2026-74950
- CVE-2026-74951
- CVE-2026-74952
- CVE-2026-74954
- CVE-2026-74955
- CVE-2026-74956
- CVE-2026-74958
- CVE-2026-74961
- CVE-2026-74966
- CVE-2026-74968
- CVE-2026-74970
- CVE-2026-74975
- CVE-2026-74977
- CVE-2026-74978
- CVE-2026-74979
- CVE-2026-74980
- CVE-2026-74981
- CVE-2026-74982
- CVE-2026-74984
- CVE-2026-74985
- CVE-2026-74986
- CVE-2026-74988
- CVE-2026-74989
Frequently Asked Questions
Which Firefox versions need to be updated?
Systems running Firefox versions earlier than Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, or Firefox ESR 153.1 are affected. The applicable fixed version depends on the Firefox release channel in use.
What should administrators do to remediate this issue?
Update Firefox to version 154, or update the relevant ESR branch to 115.39, 140.14, or 153.1. The provided information does not describe an alternative mitigation for environments where updating cannot occur immediately.