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Vulnerability details

CVE-2026-58166

OpenBMB ChatDev

OpenBMB ChatDev - Unauthenticated Path Traversal in Upload Handler Allows Arbitrary File Write and Delete

CVSS 4.0
8.8High

Official 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.

CVSS scores

ScoreVersionSourceVector
8.8High 4.0 CVEProject cvelistV5 (CNA) (VulnCheck) 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
9.1Critical 3.1 CVEProject cvelistV5 (CNA) (VulnCheck) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

VendorProductVersionsSource
OpenBMB ChatDev v ≤ 2.2.0 CVEProject cvelistV5 (CNA)

References and advisories

4
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Details

Published
2026-06-30
Last updated
2026-11-08
State
Published
Assigner (CNA)
VulnCheck

Exploit prediction (EPSS)

0.85%
Probability of exploitation in 30 days
58.4%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
Proof of concept
Technical impact
Partial

Weaknesses (CWE)

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