5.3

CVE-2025-8419: keycloak CRLF Injection

CVSS: 5.3v3.1MediumModified
AliasesCGA-f3vj-wjv2-xr4jCGA-qm4c-7mff-67pfCGA-4hx4-6fvp-jqm9
Published 06-08-2025Last modified 31-08-2026
Open JSON

Vulnerability summary

CVE-2025-8419 is a medium (CVSS 5.3) CRLF Injection vulnerability in keycloak. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.9% 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
0.45%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-63FH-C9M3-2M6Q

Timeline

  1. 06-08-2025
    PublishedVulnerability first disclosed.
  2. 31-08-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability was found in Keycloak-services. Special characters used during e-mail registration may perform SMTP Injection and unexpectedly send short unwanted e-mails. The email is limited to 64 characters (limited local part of the email), so the attack is limited to very shorts emails (subject and little data, the example is 60 chars). This flaw's only direct consequence is an unsolicited email being sent from the Keycloak server. However, this action could be a precursor for more sophisticated attacks.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

+0.04 pp

From 0.41% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.45%

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

Chainguard4 products
  • keycloakAll versions (No fix recorded)
  • keycloak-26.2All versions (No fix recorded) | < 26.2.5-r6
  • keycloak-26.2-iamguarded-compatAll versions (No fix recorded)
  • keycloak-fips-26.2-iamguarded-fipsAll versions (No fix recorded)
Keycloak1 product
Org.keycloak1 product
  • keycloak-services< 26.2.8 | ≥ 26.3.0, < 26.3.3
Redhat1 product
Wolfi1 product
  • keycloakAll versions (No fix recorded)

5 vendors · 8 products

References

12 links
Show all 12 references