CVE-2026-51883
The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 is…
- Risk score
- 65/100
- CVSS
- 9.1 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 1 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 is vulnerable to path traversal. An attacker can inject path traversal sequences (such as ..\) into the knowledge_base_name parameter to write knowledge base content to arbitrary locations outside the configured knowledge base…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.1 critical
- Remotely exploitable without logging in
References
Original description
The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 is vulnerable to path traversal. An attacker can inject path traversal sequences (such as `..\`) into the `knowledge_base_name` parameter to write knowledge base content to arbitrary locations outside the configured knowledge base root directory.
Last activity 1 Oct 2026. Patch Forecast updates every hour.