GCD AI RADAR
incidents/AIR-2025-0491

CVE-2025-6985: XML External Entity vulnerability in langchain-text-splitters

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

The HTMLSectionSplitter class in langchain-text-splitters version 0.3.8 is vulnerable to XML external entity attacks through unsafe XSLT parsing. This vulnerability allows attackers to read local files or trigger outbound HTTP fetches depending on the lxml version used.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerability
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
owasp llm top 10
mitre atlas
no technique for these categories
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Framework / tooling
products
langchain-text-splitters
incident date
6 Oct 2025
first reported
6 Oct 2025
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2025-6985 · xxe
record
created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z · json

Sources · 1

  1. 2025-10-06
    CVE-2025-6985: The HTMLSectionSplitter class in langchain-text-splitters version 0.3.8 is vulnerable to XML External Entity (XXE) attacks due to…
    NVD · nvd.nist.gov/vuln/detail/CVE-2025-6985

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