CVE-2026-7846

A vulnerability has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. Impacted is the function files of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component OpenAI-Compatible File Upload API. Such manipulation of the argument file.filename leads to time-of-check time-of-use. Access to the local network is required for this attack to succeed. The attack requires a high level of complexity. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3 2.6 LOW
CVSS v2.0 1.4 LOW

2.6^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.2 / Impact : 1.4

Attack Vector ADJACENT_NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

1.4^/10

CVSS v2.0 : LOW

Vector : AV:A/AC:H/Au:S/C:N/I:P/A:N

Exploitability : 2.5 / Impact : 2.9

Access Vector ADJACENT_NETWORK

Access Complexity HIGH

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-2-Silent-File-Overwrite.md
https://github.com/chatchat-space/Langchain-Chatchat/
https://github.com/chatchat-space/Langchain-Chatchat/issues/5463
https://vuldb.com/submit/807795
https://vuldb.com/vuln/361125
https://vuldb.com/vuln/361125/cti

Configurations

No configuration.

History

05 May 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-05 16:16

Updated : 2026-05-05 19:06

NVD link : CVE-2026-7846

Mitre link : CVE-2026-7846

CVE.ORG link : CVE-2026-7846

JSON object : View

Products Affected

No product.

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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