GHSA-w3g8-r9gw-qrh8

Suggest an improvement
Source
https://github.com/advisories/GHSA-w3g8-r9gw-qrh8
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-w3g8-r9gw-qrh8/GHSA-w3g8-r9gw-qrh8.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-w3g8-r9gw-qrh8
Aliases
Downstream
CGA (2)
ECHO (1)
Published
2025-01-13T16:58:23Z
Modified
2026-09-10T03:50:22Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Denial of Service in Keycloak Server via Security Headers
Details

A potential Denial of Service (DoS) vulnerability has been identified in Keycloak, which could allow an administrative user with the rights to change realm settings to disrupt the service. This is done by modifying any of the security headers and inserting newlines, which causes the Keycloak server to write to a request that is already terminated, leading to a failure of said request.

Service disruption may happen, users will be unable to access applications relying on Keycloak, or any of the consoles provided by Keycloak itself on the affected realm.

Database specific 
{
    "cwe_ids":  [
        "CWE-693"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2025-01-13T16:58:23Z",
    "nvd_published_at":  "2025-01-14T09:15:19Z",
    "severity":  "MODERATE"
}
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
0 Unknown introduced version / All previous versions are affected
Fixed
26.0.8

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

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-w3g8-r9gw-qrh8/GHSA-w3g8-r9gw-qrh8.json"