Vulnerability in Mozilla Firefox
CVE-2023-6866
TypedArrays can be fallible and lacked proper exception handling. This could lead to abuse in other APIs which expect TypedArrays to always succeed. This vulnerability affects Firefox < 121.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2023-56/ (Vendor Advisory)
- security.gentoo.org/glsa/202401-10 (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-6866?
- CVE-2023-6866 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Handling of Exceptional Conditions. CVSS score: 8.8/10. Published 2023-12-19.
- How severe is CVE-2023-6866?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2023-6866 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.