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CVE-2026-43982

Published: May 26, 2026

Modified: May 26, 2026

PUBLISHED

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.

Vendor	Product	Versions
xyproto	algernon	affected `< 1.17.6`

Weaknesses (CWE)

References

https://github.com/xyproto/algernon/security/advisories/GHSA-2j2c-pv62-mmcp

x_refsource_CONFIRM

https://github.com/xyproto/algernon/issues/172

x_refsource_MISC

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