CVE-2026-28807

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Source
https://cve.org/CVERecord?id=CVE-2026-28807
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28807.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-28807
Aliases
Published
2026-03-10T21:34:47Z
Modified
2026-08-12T03:51:49Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Path Traversal in wisp.serve_static allows arbitrary file read
Details

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.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28807.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "129dcb1fe10ab1e676145d91477535e1c90ab550"
                },
                {
                    "fixed": "161118c431047f7ef1ff7cabfcc38981877fdd93"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/gleam-wisp/wisp

Affected ranges

Type
GIT
Repo
https://github.com/gleam-wisp/wisp
Events
Introduced
49208beb40325811a247b85d84b7dbe57e42913d
Fixed
987d3641fa038f749f68621a87b5e9a42ee9ef83
Fixed
161118c431047f7ef1ff7cabfcc38981877fdd93
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:gleam-wisp:wisp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "2.1.1"
        },
        {
            "fixed": "2.2.1"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v2.*
v2.1.1
v2.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28807.json"