XML External Entity (XXE) Injection Affecting open-webui package, versions <0.6.33-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-CHAINGUARDLATEST-OPENWEBUI-13507093
- published9 Oct 2025
- disclosed6 Oct 2025
Introduced: 6 Oct 2025
CVE-2025-6985 (opens in a new tab)How to fix?
Upgrade Chainguard open-webui to version 0.6.33-r0 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 HTMLSectionSplitter class in langchain-text-splitters version 0.3.8 is vulnerable to XML External Entity (XXE) attacks due to unsafe XSLT parsing. This vulnerability arises because the class allows the use of arbitrary XSLT stylesheets, which are parsed using lxml.etree.parse() and lxml.etree.XSLT() without any hardening measures. In lxml versions up to 4.9.x, external entities are resolved by default, allowing attackers to read arbitrary local files or perform outbound HTTP(S) fetches. In lxml versions 5.0 and above, while entity expansion is disabled, the XSLT document() function can still read any URI unless XSLTAccessControl is applied. This vulnerability allows remote attackers to gain read-only access to any file the LangChain process can reach, including sensitive files such as SSH keys, environment files, source code, or cloud metadata. No authentication, special privileges, or user interaction are required, and the issue is exploitable in default deployments that enable custom XSLT.