CVE-2022-34476

9.8 criticalEPSS 0.7%

Critical (9.8) in mozilla firefox. EPSS 0.7% chance of exploitation in the next 30 days.

ASN.1 parsing of an indefinite SEQUENCE inside an indefinite GROUP could have resulted in the parser accepting malformed ASN.1. This vulnerability affects Firefox < 102.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2022-12-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1387919
https://www.mozilla.org/security/advisories/mfsa2022-24/
https://bugzilla.mozilla.org/show_bug.cgi?id=1387919
https://www.mozilla.org/security/advisories/mfsa2022-24/

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