CVE-2024-5693

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-06-11 · updated 2026-06-17
Weakness: CWE-829

Description

Offscreen Canvas did not properly track cross-origin tainting, which could be used to access image data from another site in violation of same-origin policy. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

Affected products

Mozilla Firefox: before 115.12; before 127.0 — fixed in 115.12, 127.0
Mozilla Thunderbird: before 115.12 — fixed in 115.12

How to fix

Upgrade to a fixed version: Mozilla Firefox 115.12, 127.0; Mozilla Thunderbird 115.12. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1891319
https://lists.debian.org/debian-lts-announce/2024/06/msg00000.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00010.html
https://www.mozilla.org/security/advisories/mfsa2024-25/
https://www.mozilla.org/security/advisories/mfsa2024-26/
https://www.mozilla.org/security/advisories/mfsa2024-28/
https://bugzilla.mozilla.org/show_bug.cgi?id=1891319
https://lists.debian.org/debian-lts-announce/2024/06/msg00000.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00010.html
https://www.mozilla.org/security/advisories/mfsa2024-25/
https://www.mozilla.org/security/advisories/mfsa2024-26/
https://www.mozilla.org/security/advisories/mfsa2024-28/

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