CVE-2026-43982
Algernon: Path traversal file write via savein()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Algernon is a small self-contained pure-Go web server. Prior to 1.17.6, uploadedFileSaveIn() in lua/upload/upload.go uses filepath.Join() with the caller-supplied directory but performs no boundary check after joining. A directory of ../../../tmp resolves cleanly to /tmp, outside the web root. This vulnerability is fixed in 1.17.6.
| CWE | CWE-22 |
| Vendor | xyproto |
| Product | algernon |
| Published | May 26, 2026 |
| Last Updated | May 26, 2026 |
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Affected Versions
xyproto / algernon
< 1.17.6