chatchat-space Langchain-Chatchat Backend upload_temp_docs path traversal
Priority MEDIUM 57CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
A vulnerability classified as critical has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This affects the function upload_temp_docs of the file /knowledge_base/upload_temp_docs of the component Backend. The manipulation of the argument flag leads to path traversal. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.006 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| chatchat-space | Langchain-Chatchat | 0.3.0; 0.3.1 | — | No fix listed | CNA |
| — | langchain-chatchat (PyPI) | up to 0.3.1.3 | — | No fix listed | GHSA-qmgv-j263-qr33 |
- Langchain-Chatchat Vendorchatchat-space Affected 0.3.0; 0.3.1 Fixed in — No fix listed CNA
- langchain-chatchat (PyPI) Vendor— Affected up to 0.3.1.3 Fixed in — No fix listed GHSA-qmgv-j263-qr33
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:chatchat-space:langchain-chatchat:*:*:*:*:*:*:*:* | up to 0.3.1 | Vulnerable | chatchat-space |
- cpe:2.3:a:chatchat-space:langchain-chatchat:*:*:*:*:*:*:*:* Versions up to 0.3.1 Vulnerable ·chatchat-space
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-6853
- 2026-10-03 Alias added: GHSA-qmgv-j263-qr33
References
More chatchat-space Langchain-chatchat vulnerabilities
- TI-2025-06227 chatchat-space Langchain-Chatchat files path traversal CVSS 4.0MEDIUM 5.3
- TI-2025-06228 chatchat-space Langchain-Chatchat file path traversal CVSS 4.0MEDIUM 5.1
Sources
- CVE-2025-6853 · CVE Program
- CVE-2025-6853 · NVD
- FIRST EPSS
- GHSA-qmgv-j263-qr33 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences