CVE-2026-47201— authentik: XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary federated user
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-47201
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
authentik: XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary federated user
Source: NVD (National Vulnerability Database)
Vulnerability Description
authentik is an open-source identity provider. Prior to versions 2025.12.5, 2026.2.3, and 2026.5.1, authentik's SAML Source ACS endpoint is vulnerable to XML Signature Wrapping when validating upstream SAML responses. An attacker with any account at the upstream IdP can reuse a valid signed assertion to authenticate as another federated user. This issue has been patched in versions 2025.12.5, 2026.2.3, and 2026.5.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| goauthentik | authentik | < 2025.12.5 | - |
II. Public POCs for CVE-2026-47201
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 10060 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month
III. Intelligence Information for CVE-2026-47201
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-47201 (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-2026-41577 | 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-2026-49448
authentik: SourceStage bypass via empty POST - CVE-2026-49443
authentik: `UserSourceConnection.user` and `GroupSourceConne - 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-2026-49448
authentik: SourceStage bypass via empty POST - CVE-2026-49443
authentik: `UserSourceConnection.user` and `GroupSourceConne - 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-20
- CVE-2026-35049
wire-ios has Persistent Remote DoS via Integer Underflow - CVE-2026-45685
OpenTelemetry eBPF Instrumentation: MongoDB parser panics on - CVE-2026-45678
OpenTelemetry eBPF Instrumentation: Postgres BIND parsing ca - CVE-2026-45676
OpenTelemetry eBPF Instrumentation: Unsafe fastelf parsing a - CVE-2026-7195
CWE-20: Improper Input Validation in web services in Progres
V. Comments for CVE-2026-47201
No comments yet