CVE-2025-9556 — CRITICAL (CVSS 9.8) AI Security Vulnerability

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...

Full analysis pending. Showing NVD description excerpt.

Severity & Risk

CVSS 3.1

9.8 / 10

EPSS

N/A

KEV Status

Not in KEV

Sophistication

N/A

Recommended Action

No patch available

Monitor for updates. Consider compensating controls or temporary mitigations.

Compliance Impact

Compliance analysis pending. Sign in for full compliance mapping when available.

Technical Details

NVD 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 Vector

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

References

Timeline

Published

September 12, 2025

Last Modified

November 3, 2025

First Seen

September 12, 2025