Auth bypass in Fosowl Agenticseek
CVE-2026-72776
AgenticSeek (commit fc242c7) contains an unauthenticated remote code execution vulnerability that allows any network-adjacent attacker to execute arbitrary commands by submitting crafted queries to the unprotected POST /query API endpoint bound to 0.0.0.0:7777 with wildcard CORS. Attackers can send unauthenticated HTTP requests that cause the autonomous agent to generate and execute shell commands through BashInterpreter using subprocess.Popen with shell=True and safety=False, bypassing the incomplete command blocklist to achieve full host-level code execution.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.011 · change: +0.003
Affected products
- Fosowl Agenticseek — versions 0
Weakness classification (CWE)
References
- github.com/Fosowl/agenticSeek/issues/520 (issue-tracking)
- github.com/Fosowl/agenticSeek (product)
- github.com/Fosowl/agenticSeek/pull/534/changes/f1eb2cfc721f8a21dd16a8b048a9ca89… (patch)
- www.vulncheck.com/advisories/agenticseek-unauthenticated-rce-via-query-api-endp… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72776?
- CVE-2026-72776 is a critical-severity vulnerability in Fosowl Agenticseek, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-08-13.
- How severe is CVE-2026-72776?
- Critical severity. CVSS v3 base score is 9.8 out of 10.