GHSA-m42m-m8cr-8m58

Source

https://github.com/advisories/GHSA-m42m-m8cr-8m58

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-m42m-m8cr-8m58/GHSA-m42m-m8cr-8m58.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-m42m-m8cr-8m58

Aliases

CVE-2025-6985

Related

CGA-cwg3-mwh5-gf68

Published

2025-10-06T18:31:07Z

Modified

2026-02-04T03:26:48.627970Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator

Summary

LangChain Text Splitters is vulnerable to XML External Entity (XXE) attacks due to unsafe XSLT parsing

Details

The HTMLSectionSplitter class in langchain-text-splitters is vulnerable to XML External Entity (XXE) attacks due to unsafe XSLT parsing. This vulnerability arises because the class allows the use of arbitrary XSLT stylesheets, which are parsed using lxml.etree.parse() and lxml.etree.XSLT() without any hardening measures. In lxml versions up to 4.9.x, external entities are resolved by default, allowing attackers to read arbitrary local files or perform outbound HTTP(S) fetches. In lxml versions 5.0 and above, while entity expansion is disabled, the XSLT document() function can still read any URI unless XSLTAccessControl is applied. This vulnerability allows remote attackers to gain read-only access to any file the LangChain process can reach, including sensitive files such as SSH keys, environment files, source code, or cloud metadata. No authentication, special privileges, or user interaction are required, and the issue is exploitable in default deployments that enable custom XSLT.

Database specific

{
    "nvd_published_at": "2025-10-06T18:15:52Z",
    "github_reviewed_at": "2025-10-07T21:32:54Z",
    "severity": "HIGH",
    "cwe_ids": [
        "CWE-611"
    ],
    "github_reviewed": true
}

References

Affected packages

PyPI / langchain-text-splitters

Package

Name: langchain-text-splitters; View open source insights on deps.dev
Purl: pkg:pypi/langchain-text-splitters

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.3.9

Affected versions

0.*

0.0.1

0.0.2

0.2.0

0.2.1

0.2.2

0.2.4

0.3.0.dev0

0.3.0.dev1

0.3.0

0.3.1

0.3.2

0.3.3

0.3.4

0.3.5

0.3.6rc1

0.3.6rc2

0.3.6

0.3.7

0.3.8

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-m42m-m8cr-8m58/GHSA-m42m-m8cr-8m58.json"