CVE-2025-9556

CriticalCVSS 9.8/10Last modified Oct 19, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

No affected versions have been published.

Timeline

Published
Sep 12, 2025
Last modified
Oct 19, 2026
NVD status
Deferred

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CVE-2025-9556: Critical severity, CVSS 9.8 | Vulnix