GHSA-v3f7-2p4r-mwfw

Suggest an improvement
Source
https://github.com/advisories/GHSA-v3f7-2p4r-mwfw
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-v3f7-2p4r-mwfw/GHSA-v3f7-2p4r-mwfw.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-v3f7-2p4r-mwfw
Aliases
Published
2026-10-29T16:39:03Z
Modified
2026-10-29T16:56:09Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Keycloak vulnerable to cross-site scripting (xss) via case-insensitive uri validation bypass
Details

Description

A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with manage-client permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a specially crafted redirect URI using a case-insensitive javascript: or data: scheme. This Cross-Site Scripting (XSS) vulnerability allows for arbitrary code execution in the Keycloak origin when a victim clicks the crafted link, such as in the logout flow or the Admin Console.

Database specific 
{
    "cwe_ids":  [
        "CWE-79"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-29T16:39:03Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}
References

Affected packages

Maven / org.keycloak:keycloak-services

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
26.6.4

Affected versions

1.*
1.0-alpha-1
1.0-alpha-1-12062013
1.0-alpha-2
1.0-alpha-3
1.0-alpha-4
1.0-beta-1
1.0-beta-1-20150521
1.0-beta-1-20150523
1.0-beta-2
1.0-beta-3
1.0-beta-4
1.0-rc-1
1.0-rc-2
1.0-final
1.0.1.Final
1.0.2.Final
1.0.3.Final
1.0.4.Final
1.0.5.Final
1.1.0.Beta1
1.1.0.Beta2
1.1.0.Final
1.1.1.Final
1.2.0.Beta1
1.2.0.CR1
1.2.0.Final
1.3.0.Final
1.3.1.Final
1.4.0.Final
1.5.0-Final
1.5.0.Final
1.5.1.Final
1.6.0.Final
1.6.1.Final
1.7.0.CR1
1.7.0.Final
1.8.0.Alpha1
1.8.0.CR1
1.8.0.CR2
1.8.0.CR3
1.8.0.Final
1.8.1.Final
1.9.0.CR1
1.9.0.Final
1.9.1.Final
1.9.2.Final
1.9.3.Final
1.9.4.Final
1.9.5.Final
1.9.7.Final
1.9.8.Final
2.*
2.0.0.CR1
2.0.0.Final
2.1.0.CR1
2.1.0.Final
2.2.0.CR1
2.2.0.Final
2.2.1.Final
2.3.0.CR1
2.3.0.Final
2.4.0.CR1
2.4.0.Final
2.5.0.CR1
2.5.0.Final
2.5.1.Final
2.5.4.Final
2.5.5.Final
3.*
3.0.0.CR1
3.0.0.Final
3.1.0.CR1
3.1.0.Final
3.2.0.CR1
3.2.0.Final
3.2.1.Final
3.3.0.CR1
3.3.0.CR2
3.3.0.Final
3.4.0.CR1
3.4.0.Final
3.4.1.CR1
3.4.1.Final
3.4.2.Final
3.4.3.Final
4.*
4.0.0.Beta1
4.0.0.Beta2
4.0.0.Beta3
4.0.0.Final
4.1.0.Final
4.2.0.Final
4.2.1.Final
4.3.0.Final
4.4.0.Final
4.5.0.Final
4.6.0.Final
4.7.0.Final
4.8.0.Final
4.8.1.Final
4.8.2.Final
4.8.3.Final
5.*
5.0.0
6.*
6.0.0
6.0.1
7.*
7.0.0
7.0.1
8.*
8.0.0
8.0.1
8.0.2
9.*
9.0.0
9.0.2
9.0.3
10.*
10.0.0
10.0.1
10.0.2
11.*
11.0.0
11.0.1
11.0.2
11.0.3
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
26.0.3
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
26.3.0
26.3.1
26.3.2
26.3.3
26.3.4
26.3.5
26.4.0
26.4.1
26.4.2
26.4.3
26.4.4
26.4.5
26.4.6
26.4.7
26.5.0
26.5.1
26.5.2
26.5.3
26.5.4
26.5.5
26.5.6
26.5.7
26.6.0
26.6.1
26.6.2
26.6.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-v3f7-2p4r-mwfw/GHSA-v3f7-2p4r-mwfw.json"