Advisory details:
github_osv / GHSA-rhgq-f8x5-j2jc
| Advisory ID | github_osv/GHSA-rhgq-f8x5-j2jc |
| Aliases |
CVE-2026-4633
|
| Summary | Keycloak's identity-first login flow exposes user information A flaw was found in Keycloak. A remote attacker can exploit differential error messages during the identity-first login flow when Organizations are enabled. This vulnerability allows an attacker to determine the existence of users, leading to information disclosure through user enumeration. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 3.3 |
| Risk | 1.6 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 3.7 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-rhgq-f8x5-j2jc/GHSA-rhgq-f8x5-j2jc.json |
| generic_textual | LOW |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/keycloak/keycloak | ||
| https://github.com/keycloak/keycloak/commit/b137016cc6dcfd9f59b2aa2e6d73af8b0ebf7c6e | ||
| https://github.com/keycloak/keycloak/commit/b4558a874fa79341404ae4d2d8f240f22bfed340 | ||
| https://github.com/keycloak/keycloak/issues/47619 | ||
| https://github.com/keycloak/keycloak/pull/47635 | ||
| CVE-2026-4633 | Advisory | https://access.redhat.com/security/cve/CVE-2026-4633 |
| CVE-2026-4633 | https://nvd.nist.gov/vuln/detail/CVE-2026-4633 | |
| RHSA-2026:19596 | Advisory | https://access.redhat.com/errata/RHSA-2026:19596 |
| show_bug.cgi?id=2450247 | Bug | https://bugzilla.redhat.com/show_bug.cgi?id=2450247 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
There are no SSVC decisions available.