CVE-2026-42784 Red Hat — Exploit & Vulnerability Details HIGH

Parameter	Value
CVSS	7.4 (HIGH)
Type	CWE-347 (Improper Verification of Cryptographic Signature)
Vendor	Red Hat
Public PoC	No

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.

Attack Parameters

Attack Vector

Network

Can be exploited remotely

Attack Complexity

Low

Easy to exploit

Privileges Required

None

No privileges needed

User Interaction

Required

User action required

Impact Assessment

Confidentiality

None

No data leak

Integrity

High

Complete data modification

Availability

None

No disruption

CVSS Vector v3.1

Weakness Type (CWE)

CWE-347 Improper Verification of Cryptographic Signature

Vulnerable Products

red hat:red hat enterprise linux 9 red hat:red hat ansible automation platform 2 red hat:red hat satellite 6 red hat:red hat hardened images red hat:red hat enterprise linux 10 red hat:red hat openshift container platform 4 red hat:confidential compute attestation red hat:red hat trusted profile analyzer