CVE-2026-41577— authentik: SAML source does not validate Conditions, timing, or audience on assertions
Possible ATT&CK Techniques 1AI
T1199 · Trusted RelationshipAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| goauthentik | authentik | < 2025.12.5 | affected |
< 2026.2.3 | affected |
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I. Basic Information for CVE-2026-41577
Vulnerability Information
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Vulnerability Title
authentik: SAML source does not validate Conditions, timing, or audience on assertions
Source: CVE Program / CVE List V5
Vulnerability Description
authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor (ResponseProcessor.parse()) does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expired assertions and acceptance of assertions intended for other service providers. This issue has been patched in versions 2025.12.5 and 2026.2.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
authentik 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
authentik是authentik开源的一个身份提供应用程序。 authentik 2025.12.5之前版本和2026.2.3之前版本存在数据伪造问题漏洞，该漏洞源于SAML源响应处理器未验证断言上的Conditions元素，可能导致重放过期断言和接受针对其他服务提供商的断言。
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 |
|---|---|---|---|---|
| goauthentik | authentik | < 2025.12.5 | - |
II. Public POCs for CVE-2026-41577
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-41577 (1)
Same Patch Batch · goauthentik · 2026-06-02 · 6 CVEs total
| CVE-2026-49448 | 9.8 CRITICAL | authentik: SourceStage bypass via empty POST |
| CVE-2026-42849 | 9.3 CRITICAL | authentik: Reflected XSS in SFE AutosubmitStage allows IDP account takeover |
| CVE-2026-49443 | 8.8 HIGH | authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable th |
| CVE-2026-47201 | 8.5 HIGH | authentik: XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary fe |
| CVE-2026-41569 | authentik: WS-Federation wreply origin bypass can exfiltrate signed login responses to att |
IV. Related Vulnerabilities
Same product: authentik
- CVE-2026-72537
Authentik Security authentik - Privilege Escalation - CVE-2026-72534
Authentik Security authentik - Privilege Escalation - CVE-2026-49448
authentik: SourceStage bypass via empty POST - CVE-2026-49443
authentik: `UserSourceConnection.user` and `GroupSourceConne - CVE-2026-47201
authentik: XML Signature Wrapping in SAML Source ACS allows
Same vendor: goauthentik
- CVE-2026-49448
authentik: SourceStage bypass via empty POST - CVE-2026-49443
authentik: `UserSourceConnection.user` and `GroupSourceConne - CVE-2026-47201
authentik: XML Signature Wrapping in SAML Source ACS allows - CVE-2026-42849
authentik: Reflected XSS in SFE AutosubmitStage allows IDP a - CVE-2026-41569
authentik: WS-Federation wreply origin bypass can exfiltrate
Same weakness: CWE-345
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V. Comments for CVE-2026-41577
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