5.3

CVE-2026-2575: redhat build_of_keycloak

CVSS: 5.3v3.1MediumModified
AliasesCGA-2m8f-q4h7-4px2CGA-3jx4-37ww-659xCGA-4p2x-2p93-72qv
Published 18-03-2026Last modified 06-10-2026
Open JSON

Vulnerability summary

CVE-2026-2575 is a medium (CVSS 5.3) vulnerability in redhat build_of_keycloak. EPSS estimates a 0.87% chance of exploitation in the next 30 days, higher than 57.9% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.87%
0%100%
Low · +0.36 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3
RHSA-2026:76128RHSA-2026:76129RHSA-2026:76130

Timeline

  1. 18-03-2026
    PublishedVulnerability first disclosed.
  2. 06-10-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.87%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

+0.36 pp

From 0.50% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.87%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard8 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-fips-26.3-iamguarded-fipsAll versions (No fix recorded)
  • keycloak-fips-26.4All versions (No fix recorded)
Org.keycloak3 products
  • keycloak-saml-adapter-core< 26.5.4
  • keycloak-saml-core< 26.5.4
  • keycloak-services< 26.5.4
Wolfi2 products
  • keycloak-26.4All versions (No fix recorded)
  • keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
Redhat1 product

4 vendors · 14 products

References

13 links
Show all 13 references