CVE-2026-42784: Improper Verification of Cryptographic Signature in Red Hat Confidential Compute Attestation
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.
CVE-2026-42784: Improper Verification of Cryptographic Signature in Red Hat Confidential Compute Attestation
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 v3.1
Score 7.4high
Affected software
Red Hat
Confidential Compute Attestation
Red Hat
Confidential Compute Attestation
Red Hat
Confidential Compute Attestation
Red Hat
Confidential Compute Attestation
Red Hat
Confidential Compute Attestation
Red Hat
Red Hat Ansible Automation Platform 2
Red Hat
Red Hat Ansible Automation Platform 2
Red Hat
Red Hat Ansible Automation Platform 2
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Hardened Images
Red Hat
Red Hat Hardened Images
Red Hat
Red Hat OpenShift Container Platform 4
Red Hat
Red Hat Satellite 6
Red Hat
Red Hat Satellite 6
Red Hat
Red Hat Trusted Profile Analyzer
Red Hat
Red Hat Trusted Profile Analyzer
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-04-29T15:09:53.696Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-42784","vendor":"Red Hat"}]
Threat ID: 6aaacb9c55bf5e2cf5e5c27f
Added to database: 09/16/2026, 17:02:20 UTC
Last updated: 09/16/2026, 17:02:20 UTC
Views: 1
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