GHSA-v897-pv23-r8cw

Suggest an improvement
Source
https://github.com/advisories/GHSA-v897-pv23-r8cw
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-v897-pv23-r8cw/GHSA-v897-pv23-r8cw.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-v897-pv23-r8cw
Downstream
Published
2026-01-15T15:31:17Z
Modified
2026-01-15T23:19:01.306601Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
Keycloak has an improper input validation vulnerability
Details

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments, potentially bypassing proxy-level path filtering. This could expose administrative or sensitive endpoints that operators believe are not externally reachable.

Database specific 
{
    "nvd_published_at": "2026-01-15T13:16:04Z",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-20"
    ],
    "github_reviewed_at": "2026-01-15T23:10:39Z",
    "severity": "LOW"
}
References

Affected packages

Maven / org.keycloak:keycloak-quarkus-server

Package

Name
org.keycloak:keycloak-quarkus-server
View open source insights on deps.dev
Purl
pkg:maven/org.keycloak/keycloak-quarkus-server

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
26.2.5

Affected versions

12.*
12.0.0
12.0.1
12.0.2
12.0.3
12.0.4
13.*
13.0.0
13.0.1
14.*
14.0.0
15.*
15.0.0
15.0.1
15.0.2
15.1.0
15.1.1
16.*
16.0.0
16.1.0
16.1.1
17.*
17.0.0
17.0.1
18.*
18.0.0
18.0.1
18.0.2
19.*
19.0.0
19.0.1
19.0.2
19.0.3
20.*
20.0.0
20.0.1
20.0.2
20.0.3
20.0.4
20.0.5
21.*
21.0.0
21.0.1
21.0.2
21.1.0
21.1.1
21.1.2
22.*
22.0.0
22.0.1
22.0.2
22.0.3
22.0.4
22.0.5
23.*
23.0.0
23.0.1
23.0.2
23.0.3
23.0.4
23.0.5
23.0.6
23.0.7
24.*
24.0.0
24.0.1
24.0.2
24.0.3
24.0.4
24.0.5
25.*
25.0.0
25.0.1
25.0.2
25.0.3
25.0.4
25.0.5
25.0.6
26.*
26.0.0
26.0.1
26.0.2
26.0.4
26.0.5
26.0.6
26.0.7
26.0.8
26.1.0
26.1.1
26.1.2
26.1.3
26.1.4
26.1.5
26.2.0
26.2.1
26.2.2
26.2.3
26.2.4
26.2.5

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-v897-pv23-r8cw/GHSA-v897-pv23-r8cw.json"