Langchaingo supports the use of jinja2 syntax when parsing prompts, which is in turn…
Priority MEDIUM 50Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00692 53rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Langchaingo | Langchaingo | 0.1.14 | — | No fix listed | CNA |
- Langchaingo VendorLangchaingo Affected 0.1.14 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-9556
- 2026-10-03 Alias added: GHSA-v6f2-g4gw-r4rc
References
Sources
- CVE-2025-9556 · CVE Program
- CVE-2025-9556 · NVD
- FIRST EPSS
- GHSA-v6f2-g4gw-r4rc · GitHub Advisory Database · CC BY 4.0
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