CVE-2026-51883
The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 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 root directory.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-51883- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2026-91122
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.
- Record
EUVD-2026-91122- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c4wm-cr62-pcg5
The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 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 root directory.
- Record
GHSA-c4wm-cr62-pcg5- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-51883- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-51883 is a critical vulnerability (CVSS 9.1), published October 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. No source names a fixed version.