CVE-2026-100783: Vulnerability in Mozilla Firefox
Uninitialized memory in the Audio/Video component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
AI Analysis
Technical Summary
This vulnerability involves uninitialized memory usage in the Audio/Video component of Mozilla Firefox. Uninitialized memory vulnerabilities can lead to unpredictable behavior, including potential information disclosure or application crashes. Mozilla has fixed this issue in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17, as documented in their security advisory. No exploit in the wild has been reported to date.
Potential Impact
The vulnerability is rated with high impact by Mozilla, indicating serious potential consequences if exploited. The exact impact details are not specified beyond the high severity rating. Uninitialized memory issues can lead to information leakage or stability problems in the browser.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. Users and administrators should update affected Firefox installations to these or later versions to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-100783: Vulnerability in Mozilla Firefox
Description
Uninitialized memory in the Audio/Video component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
CVSS v3.1
Score 4.3medium
Affected software
Mozilla
Firefox
pkg:github/mozilla/firefoxRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves uninitialized memory usage in the Audio/Video component of Mozilla Firefox. Uninitialized memory vulnerabilities can lead to unpredictable behavior, including potential information disclosure or application crashes. Mozilla has fixed this issue in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17, as documented in their security advisory. No exploit in the wild has been reported to date.
Potential Impact
The vulnerability is rated with high impact by Mozilla, indicating serious potential consequences if exploited. The exact impact details are not specified beyond the high severity rating. Uninitialized memory issues can lead to information leakage or stability problems in the browser.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. Users and administrators should update affected Firefox installations to these or later versions to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:17:00.731Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-98/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/","vendor":"Mozilla"}]
Threat ID: 6abbb3eff7a7c54106640980
Added to database: 09/29/2026, 12:49:51 UTC
Last enriched: 09/29/2026, 13:19:01 UTC
Last updated: 09/29/2026, 18:20:12 UTC
Views: 3
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