CVE-2026-42784 Sequoia-openpgp: sequoia-openpgp: cryptographic integrity compromise via key flag confusion

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...

CVE-2026-42784

sequoia-openpgp , a Rust library implementing the OpenPGP standard, incorrectly infers key flags for older certificates when a key flags subpacket is missing . This key flag confusion allows an attacker to bypass the back-signature check , illegitimately bind an arbitrary subkey to their own cert...