CVE-2025-9556
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductLangchaingo
PublishedSep 12, 2025
First seenSep 12, 2025
Weakness typeCWE-200Sensitive information exposure
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Langchaingo Langchaingo | 0.1.14 | — |
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