CVE-2026-4282: redhat build_of_keycloak
CVSS: 7.4v3.1HighModified
AliasesCGA-4hh4-4qvf-xc8xCGA-54j7-3x73-4mm6CGA-65hp-9rhg-p98rCGA-6hhr-2rh7-qqh5CGA-9wxj-f5xj-4q52CGA-pq7x-2hvw-wwj2CGA-r8fh-jr96-rj3pCGA-rf4j-qm9c-48mpCGA-2xc5-59gg-jcg6CGA-4hq3-5rwr-7385CGA-6q8j-3jmp-8jp4CGA-7cxw-97h7-6gjrCGA-7jj5-88q3-mj8jCGA-9345-6fhm-pwc4CGA-996p-6mh3-j2w6CGA-ffq3-7242-h2phCGA-m39g-5p8w-7ffcCGA-mv5f-gjg5-4gjqCGA-pc5g-f6qq-cfvhCGA-pmp8-x7fr-7f49GHSA-hj93-h7pg-fh6vBIT-keycloak-2026-4282CGA-qm43-7jh3-2pc4CGA-rv98-mr45-x5rhCGA-w9ff-4vxh-6mc4CGA-wqqj-698h-gfvg
Published 02-04-2026Last modified 15-07-2026
Vulnerability summary
CVE-2026-4282 is a high (CVSS 7.4) vulnerability in redhat build_of_keycloak. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43% of scored vulnerabilities.
CVSS score
7.4/10
010
High · v3.1 (CVE.org)EPSS score
0.52%
0%100%
Low · +0.09 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 02-04-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
Description
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.4Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NSourcesAll 5 agree
- OSV · WolfiEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · ChainguardEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · MavenEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- NVDNIST7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS trend
Probability
0.52%
Chance of exploitation in the next 30 days
Percentile
43%
Versus all other CVEs
30-day change
+0.09 pp
From 0.43% on 21-09-2026
21-09-202621-10-2026
EPSS score0.52%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Chainguard12 products
- keycloak-26.3-iamguarded-compatAll versions (No fix recorded)
- keycloak-26.4All versions (No fix recorded)
- keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
- keycloak-26.5< 26.5.7-r0
- keycloak-26.5-iamguarded-compat< 26.5.7-r0
Wolfi4 products
- keycloak-26.4All versions (No fix recorded)
- keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
- keycloak-26.5< 26.5.7-r0
- keycloak-26.5-iamguarded-compat< 26.5.7-r0
Org.keycloak1 product
- keycloak-services< 26.5.7
Redhat1 product
- build_of_keycloakna | 26.2 | 26.2.15 | 26.4 | 26.4.11
4 vendors · 18 products
References
11 links
Show all 11 references
- github.com/keycloak/keycloakPACKAGE