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.

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.

EPSS: 0.007 (48.7th percentile) — read the EPSS interpretation.

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.

Affected products

Mozilla Firefox — versions unspecified

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security@mozilla.org (Permissions Required, Issue Tracking)
security@mozilla.org (Vendor Advisory)
security@mozilla.org (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.