Vulnerability · Published Sep 2, 2026 · Assigned by VulDB

CVE-2026-84857sigoden aichat API Endpoint serve.rs memory allocation

Medium 5.3

In plain English

A medium-severity uncontrolled resource consumption in aichat from sigoden. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.6%top 49.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
sigoden	aichat	0.30.00.30.10.30.20.30.30.30.4

Weakness: CWE-789, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

References

VDB-398132 | sigoden aichat API Endpoint serve.rs memory allocation vdb-entry
VDB-398132 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-84857 | CVE Analysis and Report third-party-advisory
Submit #886265 | sigoden AIChat 0.30.0 Denial of Service third-party-advisory
https://github.com/outlookgp/CVE/tree/main/AIChat_Serve_Request_Body_DoS_Report exploit