CVE-2026-45721
Algernon: handler.lua discovery walks parent directories above the server root in github.com/xyproto/algernon
9.0
CRITICAL
CVSS 3.1
EPSS 0.44%
Description
Algernon: handler.lua discovery walks parent directories above the server root in github.com/xyproto/algernon
How to fix CVE-2026-45721
To remediate CVE-2026-45721, upgrade the affected package to a fixed version below.
- Go/github.com/xyproto/algernon—upgrade to 1.17.7 or later
- —upgrade to 1.17.7 or later
Is CVE-2026-45721 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.17.7
- from 0, < 1.17.7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |