CVE-2026-58166 | OpenBMB ChatDev through 2.2.0, fixed in commit 4fd4da6, cont… | CVSS 9.1 CRITICAL

Description

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 endpoint. Attackers can send a crafted filename containing path traversal sequences or an absolute path to the POST uploads session endpoint, which constructs the destination path without sanitization in save_upload_file, causing file write and cleanup operations to target attacker-chosen paths on the server filesystem.

Metadata

CVE ID: CVE-2026-58166
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-29 16:03 UTC
Published: 2026-06-30 15:51 UTC
Last updated: 2026-06-30 16:10 UTC
Primary CWE: CWE-22
Improper Limitation of a Pathname to a Restricted Directory …
Vendor / Product: OpenBMB / ChatDev
Sources: cve.org · NVD

Severity & Metrics

9.1 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
OpenBMB	ChatDev	—	0 ≤ 2.2.0, 4fd4da603801766b14ad8788649cfc1ad21f99a6

Weakness (CWE)

CWE	Source	Description
CWE-22	cna	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.1	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
8.8	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

References (4)