CVE-2026-102610: evalstate fast-agent · OS Command Injection
Affects evalstate fast-agentSource CVE Database V5
Not known to be exploited · CVSS 6.4 Medium : upgrade to 0.7.21 when convenient.
Data as of 6 Nov 2026, 21:04 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 6.4 |
|---|
- Patch
- Available – fixed in 0.7.21
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 6 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade evalstate fast-agent to 0.7.21.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| evalstatefast-agent | Affected
| Fixed in
|
AI-suggested
Upgrade fast-agent to version 0.7.21 or later, where this vulnerability is fixed. Avoid running the server with the --shell option unless necessary and ensure proper network access controls to restrict access to the /mcp endpoint. Since the vulnerability is fixed in 0.7.21, applying this official update is the recommended remediation.
Description
fast-agent versions prior to 0.7.21 have an OS command injection vulnerability in the serve component when started with the --shell option. The server listens on all interfaces (0.0.0.0) on port 8000 without authentication, allowing unauthenticated remote clients to invoke the /mcp endpoint and execute operating system commands as the server user. Without the --shell option, clients can still access the operator's model and configured MCP tools. This issue is fixed in version 0.7.21.
References
- github.com/evalstate/fast-agent/security/advisories/GHSA-9vhv-g5hf-m7m7 (opens in a new tab)
- github.com/evalstate/fast-agent/pull/828 (opens in a new tab)
- github.com/evalstate/fast-agent/commit/ba99f89c3ec7f1ef1c8b1ebce381c12b60dfea29 (opens in a new tab)
- github.com/evalstate/fast-agent/releases/tag/v0.7.21 (opens in a new tab)