Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-42784
Red Hat Red Hat Hardened Images — Sequoia-openpgp: sequoia-openpgp: cryptographic integrity compromise via key flag confusion
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N R C N H N 7.4 .0020 9.0 —
AFFECTED
Product Versions Fixed
Red Hat Hardened Images unspecified 0.3.2-4.hum1
Confidential Compute Attestation unspecified —
Confidential Compute Attestation unspecified —
Confidential Compute Attestation unspecified —
Confidential Compute Attestation unspecified —
Confidential Compute Attestation unspecified —
Red Hat Ansible Automation Platform 2 unspecified —
Red Hat Ansible Automation Platform 2 unspecified —
Red Hat Ansible Automation Platform 2 unspecified —
Red Hat Enterprise Linux 10 unspecified —
+ 13 more
TIMELINE
Apr 29 Reserved by redhat
Sep 16 Published (CNA: redhat)
Sep 20 PATCH SHIPPED — CVE-2026-42784 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 0.3.2-4.hum1.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| April 29, 2026 | Reserved | Reserved by redhat |
| September 16, 2026 | Published | Published (CNA: redhat) |
| September 20, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-42784 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 0.3.2-4.hum1. |
Affected
Affected products and packages — 23 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Hardened Images | — | — | 0.3.2-4.hum1 |
| 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 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 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-42784 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
