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
Exploit Intelligence
- 2026.xml (github-poc)
Timeline
- Apr 7, 2026 CVE Published
- Apr 7, 2026 CVE Updated
- Apr 10, 2026 Security Advisory
References
- 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/mfsa2026-25 url
- https://www.mozilla.org/security/advisories/mfsa2026-27 url
- https://www.mozilla.org/security/advisories/mfsa2026-28 url
- https://www.mozilla.org/security/advisories/mfsa2026-29 url