Langchain Community Vulnerable to XML External Entity (XXE) Attacks
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | langchain-community | < 0.3.27 | 0.3.27 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-6984
- https://github.com/langchain-ai/langchain-community/commit/e842452108089524e22c3a2ced851c021884556f
- https://github.com/langchain-ai/langchain-community
- https://github.com/langchain-ai/langchain/blob/d79b5813a0b3b243c612b77013768995e46c4337/libs/langchain/langchain/document_loaders/evernote.py#L1-L23
- https://huntr.com/bounties/a6b521cf-258c-41c0-9edb-d8ef976abb2a
- https://pypi.org/project/langchain-community
- https://github.com/advisories/GHSA-pc6w-59fv-rh23
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-200, CWE-611- Platform
- Python (PyPI)
- Package
langchain-community- Disclosed
- 04.09.2025
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1515 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-pc6w-59fv-rh23 - CC BY 4.0
Vulnerability history: langchain-community
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 03.2024 09.2025
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 1
- Medium 3
Disclosures per year
- 2024: 4
- 2025: 2
- 2026: 0
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Langchain Community Vulnerable to XML External Entity (XXE) Attacks this entry
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