{"id":"CVE-2026-42784","title":"A flaw was found in sequoia-openpgp","summary":"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 at…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N","cwe":["CWE-347"],"vendor":"Red Hat","product":"rust-rpm-sequoia","affected":["rust-rpm-sequoia (all versions)","rust-sequoia-sqv (all versions)","rust-sequoia-sq (all versions)","rust-rpm-sequoia (all versions)","rust-podman-sequoia-main (all versions)","openshift-sandboxed-containers/osc-monitor-rhel9 (all versions)","openshift-sandboxed-containers/osc-operator-bundle (all versions)","openshift-sandboxed-containers/osc-podvm-builder-rhel9 (all versions)","openshift-sandboxed-containers/osc-podvm-payload-rhel9 (all versions)","openshift-sandboxed-containers/osc-rhel9-operator (all versions)","ansible-automation-platform-26/hub-rhel9 (all versions)","ansible-automation-platform-27/hub-rhel9 (all versions)","python3.12-pysequoia (all versions)","rust-podman-sequoia (all versions)","trustee","trustee-guest-components (all versions)","trustee-guest-components (all versions)","rust-rpm-sequoia (all versions)","kata-containers (all versions)","python3.12-pysequoia (all versions)","python-pysequoia (all versions)","rhtpa/rhtpa-trustification-service-rhel9 (all versions)","rhtpa/rhtpa-rhel10 (all versions)"],"patched":["hardened_images"],"published":"2026-09-16","updated":"2026-10-15","sourceUpdated":"2026-10-15T15:17:34.073","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42784","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:34160","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:42078","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:42902","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76733","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76734","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76735","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:76737","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:79357","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-42784","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2464122","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42784.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-42784"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42784"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00313,"epssPercentile":0.24063,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T18:12:18.297877Z"},"ingestedAt":"2026-09-16T18:01:17.447Z","slug":"CVE-2026-42784","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Confidential Compute Attestation, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Hardened Images, Red Hat OpenShift Container Platform 4, … · no fix planned: Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux 10, Red Hat Trusted Profile Analyzer, Confidential Compute Attestation, … · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42784.json)\n- **RHSA-2026:42902** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-07-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:42902)\n- **RHSA-2026:76735** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-10-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:76735)\n- **RHSA-2026:76734** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:76734)\n- **RHSA-2026:76733** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:76733)\n- **RHSA-2026:76737** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-10-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:76737)\n- **RHSA-2026:79357** · Red Hat · fixed in: Red Hat Cost Management On-Premise 1 · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:79357)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}