SB2026090784 - Path traversal in webpack-dev-middleware
Published: September 7, 2026
Security Bulletin ID
SB2026090784
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Path traversal (CVE-ID: CVE-2026-76844)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper limitation of a pathname to a restricted directory in getFilenameFromUrl when handling requests with a publicPath that does not end in a slash. A remote attacker can send a specially crafted request to disclose sensitive information.
User interaction is required.
Remediation
Install update from vendor's website.