SB2026050767 - Ubuntu update for docker.io-app

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Main Vulnerability Database SB2026050767

SB2026050767 - Ubuntu update for docker.io-app

Published: May 7, 2026

Security Bulletin ID SB2026050767
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Path traversal (CVE-ID: CVE-2026-33747)

The vulnerability allows a remote attacker to write files outside of the BuildKit state directory.

The vulnerability exists due to improper path restriction in custom BuildKit frontend API message handling when processing a crafted API message from a custom frontend. A remote attacker can craft an API message to write files outside of the BuildKit state directory.

Exploitation requires use of an untrusted custom frontend configured with #syntax or --build-arg BUILDKIT_SYNTAX.


2) Input validation error (CVE-ID: CVE-2026-33748)

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper input validation in Git URL fragment subdir handling when processing Git URLs with a subdir component. A remote attacker can supply a crafted Git URL subdir component to disclose sensitive information.

Possible access is limited to files on the same mounted filesystem.


Remediation

Install update from vendor's website.

References