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

Quick assessment

Affected
Keycloak keycloak
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在注入漏洞，该漏洞源于电子邮件注册过程中使用特殊字符可能导致SMTP注入，发送未经请求的短邮件。

CVSS 5.3 · Medium EPSS 0.41% · P33

Affected Version Matrix 10

VendorProduct Version RangeStatus
Keycloak keycloak < 26.3.3 affected
Red Hat Red Hat Build of Keycloak any affected
Red Hat Red Hat build of Keycloak 26.0 any unaffected
26.0.15-1< * unaffected
26.0-18< * unaffected
26.0-19< * unaffected
Red Hat Red Hat build of Keycloak 26.2 any unaffected
26.2.8-1< * unaffected
26.2-8< * unaffected
26.2-8< * unaffected
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I. Basic Information for CVE-2025-8419

Vulnerability Information
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Vulnerability Title
Org.keycloak/keycloak-services: keycloak smtp inject vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在注入漏洞，该漏洞源于电子邮件注册过程中使用特殊字符可能导致SMTP注入，发送未经请求的短邮件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Keycloak keycloak 0 ~ 26.3.3 -
Red Hat Red Hat build of Keycloak 26.0 - cpe:/a:redhat:build_keycloak:26.0
Red Hat Red Hat build of Keycloak 26.0 26.0.15-1 ~ * cpe:/a:redhat:build_keycloak:26.0::el9
Red Hat Red Hat build of Keycloak 26.0 26.0-18 ~ * cpe:/a:redhat:build_keycloak:26.0::el9
Red Hat Red Hat build of Keycloak 26.0 26.0-19 ~ * cpe:/a:redhat:build_keycloak:26.0::el9
Red Hat Red Hat build of Keycloak 26.2 - cpe:/a:redhat:build_keycloak:26.2
Red Hat Red Hat build of Keycloak 26.2 26.2.8-1 ~ * cpe:/a:redhat:build_keycloak:26.2::el9
Red Hat Red Hat build of Keycloak 26.2 26.2-8 ~ * cpe:/a:redhat:build_keycloak:26.2::el9
Red Hat Red Hat build of Keycloak 26.2 26.2-8 ~ * cpe:/a:redhat:build_keycloak:26.2::el9
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:

II. Public POCs for CVE-2025-8419

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III. Intelligence Information for CVE-2025-8419

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IV. Related Vulnerabilities

Same product: keycloak
Same vendor: Keycloak
Same weakness: CWE-93

V. Comments for CVE-2025-8419

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