Improper Verification of Cryptographic Signature Affecting rpm-sequoia package, versions <0:1.10.2.1-1.el9_8


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.31% (23rd percentile)

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  • Snyk IDSNYK-ALMALINUX9-RPMSEQUOIA-20570489
  • published8 Oct 2026
  • disclosed6 Oct 2026

Introduced: 6 Oct 2026

NewCVE-2026-42784  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 rpm-sequoia to version 0:1.10.2.1-1.el9_8 or higher.
This issue was patched in ALSA-2026:76733.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rpm-sequoia package and not the rpm-sequoia package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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 Base Scores

version 3.1