CVE-2025-8419Org.keycloak/keycloak-services: keycloak smtp inject vulnerability
- 5.3MediumCVSS base score
- 0.62%Exploitation in 30 daysEPSS · top 50% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 6 days later
· 6 days later
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.62% · top 50% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- affected < 26.3.3
Red Hat · Red Hat build of Keycloak 26.0
All versions: unaffected
Red Hat · Red Hat build of Keycloak 26.0
- unaffected 26.0.15-1 – < *
Red Hat · Red Hat build of Keycloak 26.0
- unaffected 26.0-18 – < *
Red Hat · Red Hat build of Keycloak 26.0
- unaffected 26.0-19 – < *
Red Hat · Red Hat build of Keycloak 26.2
All versions: unaffected
Red Hat · Red Hat build of Keycloak 26.2
- unaffected 26.2.8-1 – < *
Red Hat · Red Hat build of Keycloak 26.2
- unaffected 26.2-8 – < *
Red Hat · Red Hat build of Keycloak 26.2
- unaffected 26.2-8 – < *
Red Hat · Red Hat Build of Keycloak
All versions: affected
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.keycloak:keycloak-servicesGHSA-m4j5-5x4r-2xp9 (opens in a new tab)
What to do
Workaround: Currently, no mitigation is available for this vulnerability.
References
References6
- RHSA-2025:15336 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:15337 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:15338 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:15339 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-8419 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2385776 (opens in a new tab)issue-trackingx_refsource_REDHAT
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-23863 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-m4j5-5x4r-2xp9 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-8419)Record last updated .