CVE-2026-7845

What it is

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.

At a glance

Exploitability

Can be exploited from the same network segment with a low-privilege account. Limited direct impact.

Exploit odds

0.1% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2026-05-05 16:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-24 08:10 UTC Last updatedMost recent change to the record

Details

Published

2026-05-05 16:16 UTC

Last modified

2026-07-24 08:10 UTC

Exploit probability

0.1% · EPSS, next 30 days

Weakness

CWE-327 · Broken cryptographic algorithm

Record status

Deferred

Attack profile CVSS 4.0 · 1.2

Attack vector

Adjacent network

Complexity

High

Attack requirements

None

Privileges needed

Low

User interaction

None

Confidentiality

None

Integrity

Low

Availability

None