Incorrect boundary conditions in the Audio/Video: Web Codecs component (Mozilla Firefox)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.56 % · percentile 47 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mozilla
- NVD status
- Modified
Description
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Weaknesses (CWE)
- CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-787 — Out-of-bounds Write
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2029070
- https://www.mozilla.org/security/advisories/mfsa2026-46/
- https://www.mozilla.org/security/advisories/mfsa2026-47/
- https://www.mozilla.org/security/advisories/mfsa2026-48/
- https://www.mozilla.org/security/advisories/mfsa2026-50/
- https://www.mozilla.org/security/advisories/mfsa2026-51/
- https://access.redhat.com/security/cve/CVE-2026-8946
- https://bugzilla.redhat.com/show_bug.cgi?id=2479849
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8946.json
- https://access.redhat.com/errata/RHSA-2026:26551
- https://access.redhat.com/errata/RHSA-2026:27715
- https://access.redhat.com/errata/RHSA-2026:26539
- https://access.redhat.com/errata/RHSA-2026:21380
- https://access.redhat.com/errata/RHSA-2026:22325
- https://access.redhat.com/errata/RHSA-2026:21382
- https://access.redhat.com/errata/RHSA-2026:22643
- https://access.redhat.com/errata/RHSA-2026:26629
- https://access.redhat.com/errata/RHSA-2026:26270
- https://access.redhat.com/errata/RHSA-2026:26606
- https://access.redhat.com/errata/RHSA-2026:26536
- https://access.redhat.com/errata/RHSA-2026:26630
- https://access.redhat.com/errata/RHSA-2026:26268
- https://access.redhat.com/errata/RHSA-2026:26491
- https://access.redhat.com/errata/RHSA-2026:26269
- https://access.redhat.com/errata/RHSA-2026:26493
- https://access.redhat.com/errata/RHSA-2026:26174
- https://access.redhat.com/errata/RHSA-2026:26492
- https://access.redhat.com/errata/RHSA-2026:26521
- https://access.redhat.com/errata/RHSA-2026:21378
- https://access.redhat.com/errata/RHSA-2026:21381
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CISA-ADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
European references
- ENISA EUVD · EUVD-2026-30894
- GCVE · GCVE-0-2026-8946
CERT-FR advisories
- CERTFR-2026-AVI-0615 — Multiples vulnérabilités dans les produits Mozilla · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*< 115.36.0cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*< 151.0.0cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*≥ 140.0 < 140.11.0cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*< 140.11
Affected products
| Product | Versions |
|---|---|
| Mozilla · Firefox | unaffected 115.36 ≤ 115.* ; unaffected 140.11 ≤ 140.* ; unaffected 151 ≤ * |
| Mozilla · Thunderbird | unaffected 140.11 ≤ 140.* ; unaffected 151 ≤ * |
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 |