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  4. CVE 2026 42784 sequoia openpgp sequoia openpgp cryptographic
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Back to active CVEs
High · CVSS 7.4CVE-2026-42784

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

Answer in brief

CVE-2026-42784 records a High severity (CVSS 7.4) vulnerability in Sequoia-openpgp: sequoia-openpgp: cryptographic integrity compromise via key flag confusion. The current sources do not mark it as known exploited. The current feed maps Red Hat/ansible-automation-platform-26/hub-rhel9 (generic), Red Hat/ansible-automation-platform-27/hub-rhel9 (generic), Red Hat/kata-containers (generic), Red Hat/openshift-sandboxed-containers/osc-monitor-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Oct 15, 2026Source checked Oct 31, 2026First seen by HOL Sep 16, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.4
Exploitation
Not marked as known exploited
Affected software
17 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/ansible-automation-platform-26/hub-rhel9 (generic), Red Hat/ansible-automation-platform-27/hub-rhel9 (generic), Red Hat/kata-containers (generic), Red Hat/openshift-sandboxed-containers/osc-monitor-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/ansible-automation-platform-26/hub-rhel9generic*Not reported
Red Hat/ansible-automation-platform-27/hub-rhel9generic*Not reported
Red Hat/kata-containersgeneric*Not reported
Red Hat/openshift-sandboxed-containers/osc-monitor-rhel9generic*Not reported
Red Hat/openshift-sandboxed-containers/osc-operator-bundlegeneric*Not reported
Red Hat/openshift-sandboxed-containers/osc-podvm-builder-rhel9generic*Not reported
Red Hat/openshift-sandboxed-containers/osc-podvm-payload-rhel9generic*Not reported
Red Hat/openshift-sandboxed-containers/osc-rhel9-operatorgeneric*Not reported
Red Hat/python3.12-pysequoiageneric*Not reported
Red Hat/python-pysequoiageneric*Not reported
Red Hat/rhtpa/rhtpa-rhel10generic*Not reported
Red Hat/rhtpa/rhtpa-trustification-service-rhel9generic*Not reported
Red Hat/rust-podman-sequoiageneric*Not reported
Red Hat/rust-rpm-sequoiageneric*Not reported
Red Hat/rust-sequoia-sqgeneric*Not reported
Red Hat/rust-sequoia-sqvgeneric*Not reported
Red Hat/trustee-guest-componentsgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/ansible-automation-platform-26/hub-rhel9, Red Hat/ansible-automation-platform-27/hub-rhel9, Red Hat/kata-containers.
  2. 2Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Evidence timeline and material changes

  1. Published upstream

    Sep 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 16, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-347
Source
CVE List V5
Source checked
Oct 31, 2026
References
10 linked sources
Open source record