CVE-2026-49448— authentik: SourceStage bypass via empty POST
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I. Basic Information for CVE-2026-49448
Vulnerability Information
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Vulnerability Title
authentik: SourceStage bypass via empty POST
Source: NVD (National Vulnerability Database)
Vulnerability Description
authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| goauthentik | authentik | < 2025.12.6 | - |
II. Public POCs for CVE-2026-49448
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6101 chars
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III. Intelligence Information for CVE-2026-49448
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Vendor Advisories for CVE-2026-49448 (1)
Same Patch Batch · goauthentik · 2026-06-02 · 6 CVEs total
| 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-2026-41577 | authentik: SAML source does not validate Conditions, timing, or audience on assertions | |
| CVE-2026-41569 | authentik: WS-Federation wreply origin bypass can exfiltrate signed login responses to att |
IV. Related Vulnerabilities
Same product: authentik
- 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 - CVE-2026-41577
authentik: SAML source does not validate Conditions, timing,
Same vendor: goauthentik
- 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 - CVE-2026-41577
authentik: SAML source does not validate Conditions, timing,
Same weakness: CWE-287
- CVE-2026-45289
CloudburstMC Protocol: Partially missing validation for FULL - CVE-2026-49443
authentik: `UserSourceConnection.user` and `GroupSourceConne - CVE-2026-10619
sayan365 student-management-system improper authentication - CVE-2026-5076
ARMember Premium <= 7.3.1 - Insecure Password Reset Mechanis - CVE-2026-10611
OTP bypass via plugin-based LDAP authentication in MISP when
V. Comments for CVE-2026-49448
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