CVE•Published 2026-06-02•Modified 2026-06-04•0 articles on news•6 live references•NVD data

CVE-2026-41577Goauthentik · Authentik

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS percentile

Exploit Prediction Scoring System · top 100% of all CVEs

Weaknesses (CWE)

CWE-345Insufficient Verification of Data Authenticity

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.

Timeline

Published 2026-06-02

Modified 2026-06-04

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag774 hosts

vuln:CVE-2026-41577

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Goauthentik Authentik"

All exposed Goauthentik Authentik instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Authentik"

HTTP body or banner mentions "Authentik" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-41577