CVE-2026-42784

7.4 HIGH

Published 2026-09-16 · Updated 2026-09-21

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

A flaw was found in sequoia-openpgp. The library incorrectly infers key flags for older certificates when a key flags subpacket is missing, leading to a discrepancy in how key capabilities are viewed. This key flag confusion allows an attacker to bypass the back-signature check. Consequently, an attacker can illegitimately bind an arbitrary subkey to their own certificate and forge signatures, completely compromising cryptographic integrity.

CVSS vector

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

Weaknesses

CWE-347

References

https://access.redhat.com/errata/RHSA-2026:42902
https://access.redhat.com/security/cve/CVE-2026-42784
https://bugzilla.redhat.com/show_bug.cgi?id=2464122

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.