How severe is CVE-2026-25748?

CVE-2026-25748 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-25748 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25748?

CVE-2026-25748 affects Goauthentik Authentik. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25748?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25748 have an EU (EUVD) identifier?

Yes. CVE-2026-25748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6702.

When was CVE-2026-25748 published?

CVE-2026-25748 was published on 2026-02-12 and last updated on 2026-06-17.

CVE-2026-25748

CVE-2026-25748 is a high-severity vulnerability in Goauthentik Authentik with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6702
Weakness: CWE-287
Affected product: Goauthentik Authentik
Published: 2026-02-12
Last modified: 2026-06-17

Description

authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue.

Frequently asked questions

What is CVE-2026-25748?: authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue.
How severe is CVE-2026-25748?: CVE-2026-25748 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-25748 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25748?: CVE-2026-25748 affects Goauthentik Authentik. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25748?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25748 have an EU (EUVD) identifier?: Yes. CVE-2026-25748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6702.
When was CVE-2026-25748 published?: CVE-2026-25748 was published on 2026-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*

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