CVE-2026-33416
firefoxVulnerabilityCVSS 7.5PatchedPoC
A public proof-of-concept or exploit code is available, raising the risk of active exploitation. A fixed version is available (see the table below).
Recommended action: Update to the fixed version listed for your distribution using the native package manager.
Severity metrics
CVSS 3.1 : 7.5 HIGH
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges requiredNone
User interactionRequired
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Vector: AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected & fixed versions by distribution
Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.
| Distribution | Package | Affected | Fixed version | Status |
|---|---|---|---|---|
| Red Hat:rhel_aus:8.2::appstream | firefox | - | 0:140.9.1-1.el8_2 | fixed |
| Red Hat:rhel_eus:9.4::appstream | firefox | - | 0:140.9.1-1.el9_4 | fixed |
| Red Hat:rhel_eus:9.6::appstream | firefox | - | 0:140.9.1-1.el9_6 | fixed |
| Red Hat:rhel_e4s:9.0::appstream | firefox | - | 0:140.9.1-1.el9_0 | fixed |
| Red Hat:rhel_aus:8.4::appstream | firefox | - | 0:140.9.1-1.el8_4 | fixed |
| Red Hat:rhel_eus_long_life:8.4::appstream | firefox | - | 0:140.9.1-1.el8_4 | fixed |
| Red Hat:enterprise_linux_eus:10.0 | firefox | - | 0:140.9.1-1.el10_0 | fixed |
| Red Hat:rhel_e4s:8.8::appstream | firefox | - | 0:140.9.1-1.el8_8 | fixed |
| Red Hat:rhel_tus:8.8::appstream | firefox | - | 0:140.9.1-1.el8_8 | fixed |
| Red Hat:rhel_aus:8.6::appstream | firefox | - | 0:140.9.1-1.el8_6 | fixed |
| Red Hat:rhel_e4s:8.6::appstream | firefox | - | 0:140.9.1-1.el8_6 | fixed |
| Red Hat:rhel_tus:8.6::appstream | firefox | - | 0:140.9.1-1.el8_6 | fixed |
| Red Hat:rhel_e4s:9.2::appstream | firefox | - | 0:140.9.1-1.el9_2 | fixed |
| Red Hat:rhel_els:7 | firefox | - | 0:140.9.1-2.el7_9 | fixed |
| Red Hat:enterprise_linux:9::appstream | firefox | - | 0:140.9.1-1.el9_7 | fixed |
| Red Hat:enterprise_linux:10.1 | firefox | - | 0:140.9.1-1.el10_1 | fixed |
| Red Hat:enterprise_linux:8::appstream | firefox | - | 0:140.9.1-1.el8_10 | fixed |
| Red Hat:enterprise_linux_eus:10.0 | thunderbird | - | 0:140.9.1-1.el10_0 | fixed |
| Red Hat:rhel_e4s:9.0::appstream | thunderbird | - | 0:140.9.1-1.el9_0 | fixed |
| Red Hat:rhel_eus:9.6::appstream | thunderbird | - | 0:140.9.1-1.el9_6 | fixed |
| Red Hat:rhel_e4s:9.2::appstream | thunderbird | - | 0:140.9.1-1.el9_2 | fixed |
| Red Hat:rhel_eus:9.4::appstream | thunderbird | - | 0:140.9.1-1.el9_4 | fixed |
| Red Hat:rhel_e4s:8.8::appstream | thunderbird | - | 0:140.9.1-1.el8_8 | fixed |
| Red Hat:rhel_tus:8.8::appstream | thunderbird | - | 0:140.9.1-1.el8_8 | fixed |
| Red Hat:rhel_aus:8.4::appstream | thunderbird | - | 0:140.9.1-1.el8_4 | fixed |
| Red Hat:rhel_eus_long_life:8.4::appstream | thunderbird | - | 0:140.9.1-1.el8_4 | fixed |
| Red Hat:rhel_aus:8.6::appstream | thunderbird | - | 0:140.9.1-1.el8_6 | fixed |
| Red Hat:rhel_e4s:8.6::appstream | thunderbird | - | 0:140.9.1-1.el8_6 | fixed |
| Red Hat:rhel_tus:8.6::appstream | thunderbird | - | 0:140.9.1-1.el8_6 | fixed |
| Red Hat:enterprise_linux:9::appstream | thunderbird | - | 0:140.9.1-1.el9_7 | fixed |
| Red Hat:enterprise_linux:8::appstream | thunderbird | - | 0:140.9.1-1.el8_10 | fixed |
| Red Hat:enterprise_linux:10.1 | thunderbird | - | 0:140.9.1-1.el10_1 | fixed |