VDB
GHSA-qf82-86x2-7q23
GHSA-qf82-86x2-7q23
PUBLISHED
CVSS 9.800000190734863 CRITICAL
Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 affects Firefox < 149.0.2 and Firefox ESR < 140.9.1.
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Timeline
- Apr 7, 2026 CVE Published
- Apr 14, 2026 Security Advisory
- Jun 30, 2026 CVE Updated
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
References
- https://www.mozilla.org/security/advisories/mfsa2026-25 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-5734 advisory
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022369%2C2023026%2C2023545%2C2023555%2C2023958%2C2025422%2C2025468%2C2025492%2C2025505 url
- https://www.mozilla.org/security/advisories/mfsa2026-27 url
- https://access.redhat.com/errata/RHSA-2026:11805 url
- https://access.redhat.com/errata/RHSA-2026:15889 url
- https://access.redhat.com/errata/RHSA-2026:7671 url
- https://access.redhat.com/errata/RHSA-2026:7672 url
- https://access.redhat.com/errata/RHSA-2026:8052 url
- https://access.redhat.com/errata/RHSA-2026:8459 url
- https://access.redhat.com/errata/RHSA-2026:9345 url
- https://access.redhat.com/errata/RHSA-2026:9638 url
- https://access.redhat.com/security/cve/CVE-2026-5734 url
- https://bugzilla.redhat.com/show_bug.cgi?id=2455897 url
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5734.json url
- https://www.mozilla.org/security/advisories/mfsa2026-28 url
- https://www.mozilla.org/security/advisories/mfsa2026-29 url
- https://access.redhat.com/errata/RHSA-2026:11813 url
- https://access.redhat.com/errata/RHSA-2026:12264 url
- https://access.redhat.com/errata/RHSA-2026:13342 url
…and 13 more