PYSEC-2026-1515
Langchain Community Vulnerable to XML External Entity (XXE) Attacks
At a glance
- Published
- Updated
- CVE
- CVE-2025-6984
- Aliases
- GHSA-pc6w-59fv-rh23
- CVSS_V3
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Description
The langchain-ai/langchain project, specifically the EverNoteLoader component, is vulnerable to XML External Entity (XXE) attacks due to insecure XML parsing. The vulnerability arises from the use of etree.iterparse() without disabling external entity references, which can lead to sensitive information disclosure. An attacker could exploit this by crafting a malicious XML payload that references local files, potentially exposing sensitive data such as /etc/passwd. This issue has been fixed in 0.3.27 of langchain-community.
Affected packages
| Package | Versions |
|---|---|
| PyPI · langchain-community | introduced 0, fixed 0.3.27 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-6984 ADVISORY
- https://github.com/langchain-ai/langchain-community/commit/e842452108089524e22c3a2ced851c021884556f WEB
- https://github.com/langchain-ai/langchain-community PACKAGE
- https://github.com/langchain-ai/langchain/blob/d79b5813a0b3b243c612b77013768995e46c4337/libs/langchain/langchain/document_loaders/evernote.py#L1-L23 WEB
- https://huntr.com/bounties/a6b521cf-258c-41c0-9edb-d8ef976abb2a WEB
- https://pypi.org/project/langchain-community PACKAGE
- https://github.com/advisories/GHSA-pc6w-59fv-rh23 ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |