goauthentik up to 2025.10.3/2025.12.3 Cookie improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in goauthentik authentik up to 2025.10.3/2025.12.3. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Cookie Handler. Performing a manipulation results in improper authentication. This vulnerability is reported as CVE-2026-25748. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in goauthentik authentik up to 2025.10.3/2025.12.3. This affects an unknown function of the component Cookie Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-25748 since 02/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2025.10.4 or 2025.12.4 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 8.6
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: authentik 2025.10.4/2025.12.4

Timelineinfo

02/05/2026 CVE reserved
02/12/2026 +7 days Advisory disclosed
02/12/2026 +0 days VulDB entry created
02/20/2026 +8 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-fj56-5763-j8pp
Status: Confirmed

CVE: CVE-2026-25748 (🔒)
GCVE (CVE): GCVE-0-2026-25748
GCVE (VulDB): GCVE-100-345807

Entryinfo

Created: 02/12/2026 23:49
Updated: 02/20/2026 19:34
Changes: 02/12/2026 23:49 (66), 02/20/2026 01:16 (11), 02/20/2026 19:34 (1)
Complete: 🔍
Cache ID: 216::103

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