Memory safety bugs fixed in Thunderbird ESR 140.13 (Mozilla Firefox)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.57 % · percentile 47 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mozilla
- NVD status
- Analyzed
Description
Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.
Weaknesses (CWE)
- CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-46252
- GCVE · GCVE-0-2026-16361
CERT-FR advisories
- CERTFR-2026-AVI-0913 — Multiples vulnérabilités dans Mozilla Thunderbird · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0910 — Multiples vulnérabilités dans les produits Mozilla · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*< 115.38.0cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*≥ 128.1.0 < 140.13.0cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*< 140.13.0
Affected products
| Product | Versions |
|---|---|
| Mozilla · Firefox | unaffected 115.38 ≤ 115.* ; unaffected 140.13 ≤ * |
| Mozilla · Thunderbird | unaffected 140.13 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |