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High 7.5Published Jun 16, 2026
CVE-2026-12314Memory safety bug fixed in Firefox 152.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-119, CWE-125, CWE-416, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jun 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mozilla firefox mozilla:firefox | before 140.12.0; before 152.0.0 | NVD |
mozilla thunderbird mozilla:thunderbird | before 140.12.0; before 152.0.0 | NVD |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2041856permissions-required
- https://www.mozilla.org/security/advisories/mfsa2026-57/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2026-58/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2026-60/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2026-61/vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.