Vulnerability in Chatchat-Space Langchain-Chatchat
CVE-2026-7847
A vulnerability was found in chatchat-space Langchain-Chatchat up to 0.3.1.3. The affected element is the function _get_file_id of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component Uploaded File Handler. Performing a manipulation results in insufficiently random values. Access to the local network is required for this attack. The attack's complexity is rated as high. The exploitability is described as difficult. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.6 (Low). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Chatchat-Space Langchain-Chatchat — versions 0.3.1.0, 0.3.1.1, 0.3.1.2
Weakness classification (CWE)
References
- vuldb.com/vuln/361126 (technical-description, vdb-entry)
- vuldb.com/vuln/361126/cti (signature, permissions-required)
- vuldb.com/submit/807796 (third-party-advisory)
- github.com/chatchat-space/Langchain-Chatchat/issues/5464 (issue-tracking)
- github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-3-Predictable-File-I… (exploit)
- github.com/chatchat-space/Langchain-Chatchat/ (product)
Frequently asked questions
- What is CVE-2026-7847?
- CVE-2026-7847 is a low-severity vulnerability in Chatchat-Space Langchain-Chatchat, classified under Cryptographic Issues. CVSS score: 2.6/10. Published 2026-05-05.
- How severe is CVE-2026-7847?
- Low severity. CVSS v3 base score is 2.6 out of 10.