CVE-2026-42784 — Vulnerability intelligence
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Published:
- CVSS
- 7.4
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
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.