CVE-2026-42784
Sequoia-openpgp: sequoia-openpgp: cryptographic integrity compromise via key flag confusion
HIGH 7.4
En bref
- Source
- NVD
- EPSS
- EPSS 0.31 % · centile 24 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- redhat
- Statut NVD
- Awaiting Analysis
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.
Faiblesses (CWE)
- CWE-347 — Vérification incorrecte d'une signature cryptographique
Références
- https://access.redhat.com/errata/RHSA-2026:34160
- https://access.redhat.com/errata/RHSA-2026:42078
- https://access.redhat.com/errata/RHSA-2026:42902
- https://access.redhat.com/errata/RHSA-2026:76733
- https://access.redhat.com/errata/RHSA-2026:76734
- https://access.redhat.com/errata/RHSA-2026:76735
- https://access.redhat.com/errata/RHSA-2026:76737
- https://access.redhat.com/errata/RHSA-2026:79357
- https://access.redhat.com/security/cve/CVE-2026-42784
- https://bugzilla.redhat.com/show_bug.cgi?id=2464122
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N | redhat |
| CVSS 3.1 | HIGH 7.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N | NVD · secalert@redhat.com (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-80888
- GCVE · GCVE-0-2026-42784
Produits affectés
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |