CVE-2026-7845

Description

A flaw has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This issue affects the function PIL.Image.tobytes of the file libs/chatchat-server/chatchat/webui_pages/dialogue/dialogue.py of the component Vision Chat Paste Image Handler. This manipulation of the argument paste_image.image_data causes use of weak hash. The attacker needs to be present on the local network. The attack is considered to have high complexity. The exploitability is assessed as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

References

https://vuldb.com/vuln/361124/cti

https://vuldb.com/vuln/361124

https://vuldb.com/submit/807794

https://github.com/chatchat-space/Langchain-Chatchat/issues/5462

https://github.com/chatchat-space/Langchain-Chatchat/

https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-1-tobytes-Hash-Collision.md

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4