CVE Explorer
CVE-2026-4633
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat Build of Keycloak","vendor":"Red Hat"}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:9ea4d7e92d6634945fe1949098732b2150eb30102a1d82f1a08f070cf677572c · sha256:a08f1a4db59b4880… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:9ea4d7e92d6634945fe1949098732b2150eb30102a1d82f1a08f070cf677572c · sha256:a08f1a4db59b4880… · /containers/cna/metrics/1/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-209","description":"Generation of Error Message Containing Sensitive Information","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:9ea4d7e92d6634945fe1949098732b2150eb30102a1d82f1a08f070cf677572c · sha256:a08f1a4db59b4880… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-4633"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:9ea4d7e92d6634945fe1949098732b2150eb30102a1d82f1a08f070cf677572c · sha256:a08f1a4db59b4880… · /containers/cna/references/0
{"name":"RHBZ#2450247","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2450247"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:9ea4d7e92d6634945fe1949098732b2150eb30102a1d82f1a08f070cf677572c · sha256:a08f1a4db59b4880… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.