What is CVE-2026-58166?

CVE-2026-58166 is a critical-severity vulnerability in Openbmb Chatdev, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-06-30.

How severe is CVE-2026-58166?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Path Traversal in Openbmb Chatdev

CVE-2026-58166

OpenBMB ChatDev through 2.2.0, fixed in commit 4fd4da6, contains a path traversal vulnerability that allows unauthenticated remote attackers to write or delete arbitrary files by supplying a malicious multipart filename in the file upload…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Openbmb Chatdev — versions 0, 4fd4da603801766b14ad8788649cfc1ad21f99a6

Weakness classification (CWE)

CWE-22 — Path Traversal

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-58166?: CVE-2026-58166 is a critical-severity vulnerability in Openbmb Chatdev, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-06-30.
How severe is CVE-2026-58166?: Critical severity. CVSS v3 base score is 9.1 out of 10.