WebP Server Go < 0.15.0 Path Traversal via Backslash Encoding on Windows
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.
CVE-2026-53779
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53779
webp_server_go
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/webp-sh/webp_server_go",
"vendor": "webp-sh",
"product": "webp_server_go",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.15.0",
"versionType": "semver"
}
],
"packageURL": "pkg:github/webp-sh/webp_server_go",
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53779
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #877 · Revision 1
- Added to Heist Feed
- Publisher date