CVE-2026-12326
HIGH
8.1
CVSS 3.1
Description
Memory safety bugs present in Firefox 151 and Thunderbird 151. 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 was fixed in Firefox 152 and Thunderbird 152.
Metadata
Severity & Metrics
8.1
HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Mozilla | Firefox | — | 152 ≤ * |
| Mozilla | Thunderbird | — | 152 ≤ * |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-119 | adp | CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer |
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 8.1 | HIGH | 3.1 | adp | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
References (5)
- Moderate Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152 https://bugzilla.mozilla.org/buglist.cgi?bug_id=1767455%2C2004308%2C2024445%2C2028182%2C2029765%2C2029883%2C2030110%2C2030149%2C2030366%2C2030374%2C2030564%2C2031120%2C2033411%2C2038695%2C2042465%2C2042781%2C2042907
- Low Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152 https://bugzilla.mozilla.org/buglist.cgi?bug_id=2021955%2C2025960%2C2029066%2C2029403%2C2029435%2C2029803%2C2030570%2C2030573%2C2032264%2C2033234%2C2034816%2C2035907%2C2035963%2C2036895%2C2036898%2C2036907%2C2036909%2C2036928%2C2036931%2C2036932%2C2036934%2C2039238%2C2039463
- High Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152 https://bugzilla.mozilla.org/buglist.cgi?bug_id=2039050%2C2042718%2C2042760%2C2044831%2C2045307%2C2045398%2C2045516%2C2045572%2C2041741%2C2044433
- https://www.mozilla.org/security/advisories/mfsa2026-57/
- https://www.mozilla.org/security/advisories/mfsa2026-60/