VULNERABILITY INTELLIGENCE

CVE-2026-43982

EPSS probability0.34%
CISA KEVNot currently listed
Published2026-05-26
Last modified2026-07-24

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-22

Primary references