Improper Verification of Cryptographic Signature Affecting podman-gvproxy package, versions *


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.37% (30th percentile)

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  • Snyk IDSNYK-CENTOS8-PODMANGVPROXY-17894232
  • published8 Jul 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39831  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 podman-gvproxy.

NVD Description

Note: Versions mentioned in the description apply only to the upstream podman-gvproxy package and not the podman-gvproxy package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.

CVSS Base Scores

version 3.1