CVE-2026-53779 Details
Description
WebP Server Go through 0.14.4 contains a path traversal vulnerability on Windows that allows unauthenticated attackers to read files outside the configured IMG_PATH directory by sending requests with percent-encoded backslashes (%5C) that bypass the path.Clean() sanitization in handler/router.go. Attackers can exploit the discrepancy between Go's forward-slash-only path normalization and Windows file system APIs that treat backslashes and forward slashes as equivalent to access arbitrary files on the host filesystem accessible to the server process.
A path traversal vulnerability has been identified in WebP Server Go versions prior to 0.15.0, specifically on Windows systems. This vulnerability allows unauthenticated attackers to read files outside the designated IMG_PATH directory. Exploitation involves sending requests with percent-encoded backslashes that evade the path sanitization process. The vulnerability arises from a mismatch between Go's handling of file paths and Windows file system APIs, enabling access to arbitrary files accessible to the server process.
Users are advised to upgrade to WebP Server Go version 0.15.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 22, 2026CISA-ADP
Assessed Jun 23, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| WebP Server Go | < 0.15.0 (semver) |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 14, 2026 | CVE Modified | [email protected] |
| Jun 23, 2026 | CVE Modified | CISA-ADP |
| Jun 22, 2026 | New CVE Received | [email protected] |