CVE-2026-7845

LOW EPSS 3.7%
Published May 5, 20261mo ago · Modified Jun 17, 20261w ago
1.2 CVSS 4.0
Low
Find Similar
Published May 5, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
1.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Adjacent
Attack Complexity High
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
3.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-327
CWE-328

References 6

  • github.com https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-1-tobytes-Hash-Collision.md
  • github.com https://github.com/chatchat-space/Langchain-Chatchat/
  • github.com https://github.com/chatchat-space/Langchain-Chatchat/issues/5462
  • vuldb.com https://vuldb.com/submit/807794
  • vuldb.com https://vuldb.com/vuln/361124
  • vuldb.com https://vuldb.com/vuln/361124/cti

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.