Link Following Affecting open-webui package, versions <0.8.12-r3


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-OPENWEBUI-16078100
  • published16 Apr 2026
  • disclosed31 Mar 2026

Introduced: 31 Mar 2026

NewCVE-2026-34452  (opens in a new tab)
CWE-59  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade Chainguard open-webui to version 0.8.12-r3 or higher.

NVD Description

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

The Claude SDK for Python provides access to the Claude API from Python applications. From version 0.86.0 to before version 0.87.0, the async local filesystem memory tool in the Anthropic Python SDK validated that model-supplied paths resolved inside the sandboxed memory directory, but then returned the unresolved path for subsequent file operations. A local attacker able to write to the memory directory could retarget a symlink between validation and use, causing reads or writes to escape the sandbox. The synchronous memory tool implementation was not affected. This issue has been patched in version 0.87.0.

CVSS Base Scores

version 3.1