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Advisory record · GHSA-pc6w-59fv-rh23

Langchain Community Vulnerable to XML External Entity (XXE) Attacks

CVSS 7.5 HighEPSS 0.016 · 76th percentile

Published by the GitHub Advisory Database at 4 Sept 2025, 12:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
langchain-communityPyPI<0.3.270.3.27
Identifiers
GHSA-pc6w-59fv-rh23 · CVE-2025-6984 · PYSEC-2026-1515
Weakness (CWE)
CWE-200 · CWE-611
Tags
Published
4 Sept 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

langchain-community versions before 0.3.27 are vulnerable to XML External Entity (XXE) attacks through the EverNoteLoader component, which parses XML without disabling external entity references. An attacker who can supply a crafted XML file to this loader could read local files and disclose sensitive data. Upgrade to langchain-community 0.3.27 or later.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CNA (@huntr_ai)
  • CISA KEV Not listed.
  • EPSS 0.016, the 76th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:34 UTC First seen by agentprime
  2. 31 Oct 2026, 14:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.