CVE-2026-7307: redhat build_of_keycloak
CVSS: 7.5v3.1HighModified
AliasesCGA-3vqw-rppr-xvwvCGA-92gf-72rg-5vm9CGA-f4p6-fjg5-v3gqCGA-m67r-2m77-7xc8CGA-m6qv-p455-x3m8CGA-p3v4-xg44-qwrwCGA-qhxg-3r2h-84j8CGA-x9wq-pxvc-j4xvCGA-2c8c-w76r-gqjvCGA-4vp5-p3jp-w3vfCGA-5h3w-j9fr-cvm8CGA-5m8c-pwgr-4qw3CGA-66jr-7vrm-r863CGA-765w-jj6h-9rgpCGA-8w6q-jgmg-5j4hCGA-c7hm-76gv-xq4qCGA-cv2x-4532-j946CGA-fg79-p3ww-874pCGA-fxxj-fgfm-f3v4CGA-hcjh-fj5r-cwhwCGA-p5c9-q7pp-gmxfGHSA-p5mv-gj8j-xqgfBIT-keycloak-2026-7307CGA-r6h2-x7j8-wx6xCGA-rjwq-v242-fhpcCGA-rvp7-3j8m-fv22
Published 19-05-2026Last modified 06-10-2026
Vulnerability summary
CVE-2026-7307 is a high (CVSS 7.5) vulnerability in redhat build_of_keycloak. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 62.5% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
1.01%
0%100%
Low · +0.27 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3Timeline
- 19-05-2026PublishedVulnerability first disclosed.
- 06-10-2026Last modifiedVulnerability information updated.
Description
A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 5 agree
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · MavenEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.01%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
+0.27 pp
From 0.74% on 19-09-2026
19-09-202619-10-2026
EPSS score1.01%
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-26.4All versions (No fix recorded)
- keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
- keycloak-26.5All versions (No fix recorded)
- keycloak-26.5-iamguarded-compatAll versions (No fix recorded)
- keycloak-fips-26.4All versions (No fix recorded)
Wolfi4 products
- keycloak-26.4All versions (No fix recorded)
- keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
- keycloak-26.5All versions (No fix recorded)
- keycloak-26.5-iamguarded-compatAll versions (No fix recorded)
Org.keycloak1 product
- keycloak-saml-core< 26.6.2
Redhat1 product
- build_of_keycloak≥ 26.4, < 26.4.12
4 vendors · 18 products
References
17 linksShow all 17 references
- github.com/keycloak/keycloakPACKAGE