VDB
CVE-2026-8946
CVE-2026-8946
PUBLISHED
CVSS 7.5 HIGH
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.
EPSS 0.05% · 15.7th percentile
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score
0.05%
15.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| mozilla | firefox | 0, 0, 140.0 |
| mozilla | thunderbird | 0 |
| Mozilla | Firefox | 115.36, 140.11, 151 |
| Mozilla | Thunderbird | 151, 140.11 |
Timeline
- May 19, 2026 CVE Published
- May 19, 2026 CVE Updated
- May 20, 2026 EPSS Score
- May 20, 2026 Coalition ESS Score
- May 20, 2026 Security Advisory
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score
- May 27, 2026 EPSS Score
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2029070 url
- https://www.mozilla.org/security/advisories/mfsa2026-46/ url
- https://www.mozilla.org/security/advisories/mfsa2026-47/ url
- https://www.mozilla.org/security/advisories/mfsa2026-48/ url
- https://www.mozilla.org/security/advisories/mfsa2026-50/ url
- https://www.mozilla.org/security/advisories/mfsa2026-51/ url
- https://nvd.nist.gov/vuln/detail/CVE-2026-8946 advisory
- https://www.mozilla.org/security/advisories/mfsa2026-46 url
- https://www.mozilla.org/security/advisories/mfsa2026-47 url
- https://www.mozilla.org/security/advisories/mfsa2026-48 url
- https://www.mozilla.org/security/advisories/mfsa2026-50 url
- https://www.mozilla.org/security/advisories/mfsa2026-51 url