PYSEC-2026-2558

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/langchain-chatchat/PYSEC-2026-2558.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-2558
Aliases
Published
2026-07-13T15:02:57Z
Modified
2026-07-13T16:31:48Z
Severity
  • 2.6 (Low) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • 1.2 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
Langchain-Chatchat Uses a Broken or Risky Cryptographic Algorithm
Details

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

Affected packages

PyPI / langchain-chatchat

Package

Name
langchain-chatchat
View open source insights on deps.dev
Purl
pkg:pypi/langchain-chatchat

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Last Affected
0.3.1.3

Affected versions

0.*
0.3.0
0.3.0.20240506
0.3.0.20240606
0.3.0.20240610
0.3.0.20240610.1
0.3.0.20240611
0.3.0.20240612
0.3.0.20240612.1
0.3.0.20240612.2
0.3.0.20240612.3
0.3.0.20240612.4
0.3.0.20240616
0.3.0.20240618
0.3.0.20240619
0.3.0.20240621
0.3.0.20240621.3
0.3.0.20240625
0.3.0.20240625.1
0.3.1
0.3.1.1
0.3.1.2
0.3.1.3

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/langchain-chatchat/PYSEC-2026-2558.yaml"