CVE-2026-100351

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Source
https://cve.org/CVERecord?id=CVE-2026-100351
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100351.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-100351
Aliases
Published
2026-10-15T15:52:30Z
Modified
2026-10-16T02:47:26Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
kin-openapi: ValidationHandler security-requirement bypass via encoded-path operation confusion
Details

kin-openapi is a Go project for handling OpenAPI files. From 0.144.0 until 0.147.0, openapi3filter.ValidationHandler validates an operation selected from decoded URL.Path while a downstream gorilla/mux router configured with UseEncodedPath can dispatch a different operation selected from URL.RawPath. When a public exact route and a protected parameterized route use the same method and overlap after decoding, an unauthenticated remote request containing an encoded path separator can be validated as public and then dispatched to the protected handler without invoking the configured AuthenticationFunc. The reachable path parameter is constrained to an encoded representation that decodes to the public literal route, and proxies that canonicalize the URI before forwarding prevent this specific mismatch. This issue is fixed in version 0.147.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-289",
        "CWE-436"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100351.json"
}
References

Affected packages

Git / github.com/getkin/kin-openapi

Affected ranges

Type
GIT
Repo
https://github.com/getkin/kin-openapi
Events
Introduced
f0407d53b0730280266f454b755010e7eeb985da
Fixed
eda80e2676e9f577ceed2dd80e64f16083edb041
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0.144.0"
        },
        {
            "fixed":  "0.147.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.144.0
v0.145.0
v0.146.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100351.json"