5.4

CVE-2025-14778: keycloak-26.4 Incorrect Privilege Assignment

CVSS: 5.4v3.1MediumDeferred
AliasesCGA-2qhp-jmqq-ggq9CGA-466w-q6pg-6pr7CGA-mxj8-r99g-5gj2
Published 09-02-2026Last modified 10-02-2026
Open JSON

Vulnerability summary

CVE-2025-14778 is a medium (CVSS 5.4) Incorrect Privilege Assignment vulnerability in keycloak-26.4. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.32%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-02-2026
    PublishedVulnerability first disclosed.
  2. 10-02-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in Keycloak. A significant Broken Access Control vulnerability exists in the UserManagedPermissionService (UMA Protection API). When updating or deleting a UMA policy associated with multiple resources, the authorization check only verifies the caller's ownership against the first resource in the policy's list. This allows a user (Owner A) who owns one resource (RA) to update a shared policy and modify authorization rules for other resources (e.g., RB) in that same policy, even if those other resources are owned by a different user (Owner B). This constitutes a horizontal privilege escalation.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

+0.02 pp

From 0.30% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.32%

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)
Wolfi2 products
  • keycloak-26.4All versions (No fix recorded)
  • keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
Org.keycloak1 product
  • keycloak-services< 26.2.13 | ≥ 26.5.0, < 26.5.3 | ≥ 26.3.0, < 26.4.9

3 vendors · 11 products

References

10 links