CVE-2023-4045Offscreen Canvas did not properly track cross-origin tainting, which could have been used to access image data from another site in violation of same-origin policy.
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No exploitation reported and no EPSS estimate yet.
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Offscreen Canvas did not properly track cross-origin tainting, which could have been used to access image data from another site in violation of same-origin policy. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
- CVSS
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-346
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 24, 2026
- First seen by InfoSec Signals
- Oct 24, 2026
Affected products
mozilla firefox mozilla:firefox | before 116.0; from 102.0 before 102.14; from 115.0 before 115.1 | NVD |
debian debian_linux debian:debian_linux | 11.0; 12.0 | NVD |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1833876issue-tracking, permissions-required
- https://lists.debian.org/debian-lts-announce/2023/08/msg00008.html
- https://lists.debian.org/debian-lts-announce/2023/08/msg00010.html
- https://www.debian.org/security/2023/dsa-5464third-party-advisory
- https://www.debian.org/security/2023/dsa-5469third-party-advisory
- https://www.mozilla.org/security/advisories/mfsa2023-29/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2023-30/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2023-31/vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.