CVE-2026-41569: authentik is an open-source identity provider

Q: How do I fix CVE-2026-41569?

authentik: upgrade to 2026.2.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-41569 being exploited?

CVE-2026-41569 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41569 affect?

CVE-2026-41569 affects authentik. Severity is medium (CVSS 6.1). authentik is an open-source identity provider. Prior to version 2026.2.3, the WS-Federation provider validates the user-supplied wreply parameter using a raw string prefix check rather than proper URL parsing. An attacker who can craft a lo

Q: How urgent is CVE-2026-41569?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2026-41569 is a medium-severity flaw (CVSS 6.1) affecting authentik. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

authentik is an open-source identity provider. Prior to version 2026.2.3, the WS-Federation provider validates the user-supplied wreply parameter using a raw string prefix check rather than proper URL parsing. An attacker who can craft a login link can supply a wreply value on a different origin that passes the check (e.g. https://portal.example.com.evil.tld/), causing the victim's browser to POST the signed WS-Federation login response to attack

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-601
Published	2026-06-02
Last modified	2026-07-22

Publisher (CNA): GitHub, Inc. · Vendor: goauthentik

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 21:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

goauthentik authentik UPGRADE

Affected: < 2026.2.3

Fixed in: 2026.2.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy authentik || rpm -q authentik || authentik --version

2. UPGRADE to 2026.2.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade authentik

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade authentik

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41569?

authentik: upgrade to 2026.2.3. Exact commands for each OS are on this page.

Is CVE-2026-41569 being exploited?

CVE-2026-41569 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41569 affect?

CVE-2026-41569 affects authentik. Severity is medium (CVSS 6.1). authentik is an open-source identity provider. Prior to version 2026.2.3, the WS-Federation provider validates the user-supplied wreply parameter using a raw string prefix check rather than proper URL parsing. An attacker who can craft a lo

How urgent is CVE-2026-41569?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2026-49448 CRITICAL 9.8 UPGRADE authentik is an open-source identity provider
CVE-2026-49443 HIGH 8.8 UPGRADE authentik is an open-source identity provider
CVE-2026-42849 CRITICAL 9.3 UPGRADE authentik is an open-source identity provider
CVE-2026-41577 HIGH 7.5 UPGRADE authentik is an open-source identity provider
CVE-2026-47201 HIGH 8.5 UPGRADE authentik is an open-source identity provider

References

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