Description (CNA)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in gleam-wisp wisp allows arbitrary file read via percent-encoded path traversal. The wisp.serve_static function is vulnerable to path traversal because sanitization runs before percent-decoding. The encoded sequence %2e%2e passes through string.replace unchanged, then uri.percent_decode converts it to .., which the OS resolves as directory traversal when the file is read. An unauthenticated attacker can read any file readable by the application process in a single HTTP request, including application source code, configuration files, secrets, and system files. This issue affects wisp: from 2.1.1 before 2.2.1.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| gleam-wisp / wisp | affected 2.1.1 before 2.2.1 |
| gleam-wisp / wisp | affected 129dcb1fe10ab1e676145d91477535e1c90ab550 before 161118c431047f7ef1ff7cabfcc38981877fdd93 |
CWE
CWE-22
References
- https://github.com/gleam-wisp/wisp/security/advisories/GHSA-h7cj-j2vv-qw8r
- https://cna.erlef.org/cves/CVE-2026-28807.html
- https://osv.dev/vulnerability/EEF-CVE-2026-28807
- https://github.com/gleam-wisp/wisp/commit/161118c431047f7ef1ff7cabfcc38981877fdd93
ADP enrichment
No English description supplied.
No references supplied.