Vulnerability · Published Sep 12, 2025 · Assigned by certcc
CVE-2025-9556CVE-2025-9556
Critical 9.8
In plain English
A critical-severity security flaw in Langchaingo from Langchaingo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 46.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Langchaingo | Langchaingo | 0.1.14 |