GHSA-rr5q-3xwr-f323
Suggest an improvement- Source
- https://github.com/advisories/GHSA-rr5q-3xwr-f323
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-rr5q-3xwr-f323/GHSA-rr5q-3xwr-f323.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-rr5q-3xwr-f323
- Aliases
-
- CVE-2026-9704
- Downstream
- Published
- 2026-05-27T15:33:25Z
- Modified
- 2026-07-01T19:15:22.516010842Z
- Severity
-
- 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- Keycloak Vulnerable to Improper Validation of Specified Quantity in Input
- Details
-
A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subject_token JSON Web Token (JWT) to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client credentials. This allows the user to gain the permissions of the client's service account, leading to privilege escalation.
- Database specific
{ "github_reviewed_at": "2026-07-01T19:09:45Z", "nvd_published_at": "2026-05-27T14:17:40Z", "github_reviewed": true, "cwe_ids": [ "CWE-1284" ], "severity": "MODERATE" }- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2026-9704
- https://github.com/keycloak/keycloak/issues/49435
- https://github.com/keycloak/keycloak/pull/49472
- https://github.com/keycloak/keycloak/commit/f1e5b7776c42938d0782fd5846346b8f75c815e6
- https://access.redhat.com/errata/RHSA-2026:25097
- https://access.redhat.com/errata/RHSA-2026:25098
- https://access.redhat.com/errata/RHSA-2026:30049
- https://access.redhat.com/errata/RHSA-2026:30050
- https://access.redhat.com/security/cve/CVE-2026-9704
- https://bugzilla.redhat.com/show_bug.cgi?id=2481877
- https://github.com/keycloak/keycloak
Affected packages
Maven / org.keycloak:keycloak-server-spi-private
Package
- Name
- org.keycloak:keycloak-server-spi-private
- View open source insights on deps.dev
- Purl
- pkg:maven/org.keycloak/keycloak-server-spi-private
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed26.6.3
Affected versions
2.*
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
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
-
Introduced0Unknown introduced version / All previous versions are affectedFixed26.6.3
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