high8.7
CVE-2026-43982
Algernon is a small self-contained pure-Go web server.
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Algernon Is A Small Self-Contained Pure-Go Web Server. | before 1.17.6 |
Versions were read from the advisory text. No structured product data has been published for this record yet.