CVE-2026-6783
MEDIUMCVSS 5.3/10EPSS 0.23%
Last modified
CVE-2026-6783 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.
Description
Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 150.0 |
| Mozilla | Thunderbird | < 150.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2027564Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-30/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-33/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-6783?
Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
How severe is CVE-2026-6783?
CVE-2026-6783 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.
How do I fix CVE-2026-6783?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-6783?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST