SB20261112127 - Reliance on Untrusted Inputs in a Security Decision in Podman

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Main Vulnerability Database SB20261112127

SB20261112127 - Reliance on Untrusted Inputs in a Security Decision in Podman

Published: November 12, 2026

Security Bulletin ID SB20261112127
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Reliance on Untrusted Inputs in a Security Decision (CVE-ID: CVE-2026-121885)

CWE-ID: CWE-807 - Reliance on Untrusted Inputs in a Security Decision

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service by triggering restarts of arbitrary systemd units.

The vulnerability exists due to reliance on untrusted image labels in podman auto-update when determining whether a container has auto-update enabled and which systemd unit to restart. A remote attacker can trick a user into starting a container from an image containing crafted io.containers.autoupdate and PODMAN_SYSTEMD_UNIT labels and subsequently running podman auto-update to restart arbitrary systemd units with the privileges of the user running Podman.


Remediation

Install update from vendor's website.

References