CVE-2026-7845chatchat-space Langchain-Chatchat Vision Chat Paste Image dialogue.py PIL.Image.tobytes weak hash
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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
- 2.6 LOW (v3.1, CNA)CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
- Weakness (CWE)
- CWE-328, CWE-327
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- May 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
chatchat-space Langchain-Chatchat chatchat_space:langchain_chatchat (from the name) | 0.3.1.0; 0.3.1.1; 0.3.1.2; 0.3.1.3 | CNA record |
References
- https://vuldb.com/vuln/361124vdb-entry, technical-description
- https://vuldb.com/vuln/361124/ctisignature, permissions-required
- https://vuldb.com/submit/807794third-party-advisory
- https://github.com/chatchat-space/Langchain-Chatchat/issues/5462issue-tracking
- https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-1-tobytes-Hash-Collision.mdexploit
- https://github.com/chatchat-space/Langchain-Chatchat/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.