CVE-2026-43982

published 2026-05-26

CVE-2026-43982: 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…

Priority P3 51 high 8.7 CVSS 4.0

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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

1 ranges

Vendor	Product	Version range	Fixed in
xyproto	algernon	< 1.17.6	1.17.6

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CWE-22