漏洞信息
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Vulnerability Title
authentik: Account Takeover via SAML NameID Comment Truncation
Vulnerability Description
authentik is an open-source identity provider. Prior to 2026.2.6 and 2026.5.5, an inbound SAML Source configured with the non-default USERNAME_LINK or EMAIL_LINK user-matching mode interprets an XML comment in a NameID differently from the identity provider's signed assertion. An attacker with an account on the source identity provider who can set the account's NameID can inject an XML comment that truncates the value used by authentik to the text before the comment while the signed assertion remains valid. A crafted NameID can therefore truncate to a victim's username or email and bind the attacker's external identity to the victim's existing account. This grants full takeover without the victim's password or the identity provider's private key, and the malicious link persists so later logins succeed without the comment. Sources using the default unique-identifier matching mode and authentik's outbound SAML Provider role are not affected. This issue is fixed in versions 2026.2.6 and 2026.5.5.
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Vulnerability Type
解释冲突
Vulnerability Title
Authentik Security authentik 处理逻辑错误漏洞
Vulnerability Description
Authentik Security authentik是Authentik Security组织的一个用于现代 SSO 的开源身份提供商 (IdP)。 Authentik Security authentik 2026.2.6之前版本和2026.5.0至2026.5.5之前版本存在处理逻辑错误漏洞,该漏洞源于对NameID中XML注释的解释不一致,可能导致攻击者通过特制NameID将外部身份绑定到受害者现有账户,实现完全接管。
CVSS Information
N/A
Vulnerability Type
N/A