CVE-2024-4769
This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
Does this matter?
Lower severity and a low EPSS score (0.37%). Track it; it rarely justifies an emergency change on its own.
Description
When importing resources using Web Workers, error messages would distinguish the difference between `application/javascript` responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.37% probability · 31th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-351
- Affected
- mozilla/firefox · mozilla/thunderbird · debian/debian linux
- Source
- security@mozilla.org
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1886108Issue Tracking
- https://lists.debian.org/debian-lts-announce/2024/05/msg00010.htmlMailing List
- https://lists.debian.org/debian-lts-announce/2024/05/msg00012.htmlMailing List
- https://www.mozilla.org/security/advisories/mfsa2024-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2024-22/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2024-23/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1886108Issue Tracking
- https://lists.debian.org/debian-lts-announce/2024/05/msg00010.htmlMailing List
- https://lists.debian.org/debian-lts-announce/2024/05/msg00012.htmlMailing List
- https://www.mozilla.org/security/advisories/mfsa2024-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2024-22/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2024-23/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.