CVE-2025-9556

CRITICAL EPSS 47.2%
Published Sep 12, 20259mo ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Sep 12, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

Langchaingo supports the use of jinja2 syntax when parsing prompts, which is in turn parsed using the gonja library v1.5.3. Gonja supports include and extends syntax to read files, which leads to a server side template injection vulnerability within langchaingo, allowing an attacker to insert a statement into a prompt to read the "etc/passwd" file.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
47.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

References 3

  • github.com https://github.com/tmc/langchaingo/pull/1348
  • github.com https://github.com/tmc/langchaingo/security/advisories/GHSA-mgcj-g55g-rf6h
  • kb.cert.org https://www.kb.cert.org/vuls/id/949137

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.