Resource exhaustion in Sigoden Aichat
CVE-2026-84857
A flaw has been found in sigoden aichat up to 0.30.4. This affects an unknown function of the file src/serve.rs of the component API Endpoint. This manipulation causes uncontrolled memory allocation. The attack can be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (49.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.003
Affected products
- Sigoden Aichat — versions 0.30.0, 0.30.1, 0.30.2
Weakness classification (CWE)
References
- github.com/outlookgp/CVE/tree/main/AIChat_Serve_Request_Body_DoS_Report (exploit)
- vuldb.com/cve/CVE-2026-84857 (third-party-advisory)
- vuldb.com/submit/886265 (third-party-advisory)
- vuldb.com/vuln/398132 (vdb-entry)
- vuldb.com/vuln/398132/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-84857?
- CVE-2026-84857 is a medium-severity vulnerability in Sigoden Aichat, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-09-02.
- How severe is CVE-2026-84857?
- Medium severity. CVSS v3 base score is 5.3 out of 10.