← Vulnerability feed

Vulnerability record · CVE-2026-42849 · published 2 June 2026

CVE-2026-42849: Goauthentik authentik cross-site scripting vulnerability

Goauthentik · Authentik

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, due to the implementation of stages in the SFE (Simple Flow Executor) in order to make the interface more compatible with legacy browsers, it was possible to use an XSS exploit in the AutosubmitStage. This issue has been patched in versions 2025.12.5 and 2026.2.3.

9.3 CVSS 3.1 Critical EPSS 0.47% · top 61.5% CWE-79 · Cross-site scripting
9.3CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
22 Jul 2026Last modified by NVD

Description

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, due to the implementation of stages in the SFE (Simple Flow Executor) in order to make the interface more compatible with legacy browsers, it was possible to use an XSS exploit in the AutosubmitStage. This issue has been patched in versions 2025.12.5 and 2026.2.3.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/goauthentik/authentik/security/advisories/GHSA-pgff-5mx8-fqj3 Vendor Advisory

Track CVE-2026-42849 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-49448Goauthentik authentik improper authentication vulnerabilityauthentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an em…EPSS 0.58%9.8CVE-2024-38371Goauthentik authentik improper access control vulnerabilityauthentik is an open-source Identity Provider. Access restrictions assigned to an application were not checked when using the OAuth2 Device code flow…EPSS 0.59%9.8CVE-2023-48228Goauthentik authentik improper authentication vulnerabilityauthentik is an open-source identity provider. When initialising a oauth2 flow with a `code_challenge` and `code_method` (thus requesting PKCE), the …EPSS 1.2%9.8CVE-2023-46249Goauthentik authentik improper authentication vulnerabilityauthentik is an open-source Identity Provider. Prior to versions 2023.8.4 and 2023.10.2, when the default admin user has been deleted, it is potentia…EPSS 0.65%9.8CVE-2022-46145Goauthentik authentik improper authentication vulnerabilityauthentik is an open-source identity provider. Versions prior to 2022.11.2 and 2022.10.2 are vulnerable to unauthorized user creation and potential a…EPSS 1.2%9.0CVE-2024-47070Goauthentik authentik improper authentication vulnerabilityauthentik is an open-source identity provider. A vulnerability that exists in versions prior to 2024.8.3 and 2024.6.5 allows bypassing password login…EPSS 0.57%8.8CVE-2026-49443Goauthentik authentik improper authentication vulnerabilityauthentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, an attacker with the ability to change a source c…EPSS 0.44%8.8CVE-2026-25922Goauthentik authentik improper authentication vulnerabilityauthentik is an open-source identity provider. Prior to 2025.8.6, 2025.10.4, and 2025.12.4, when using a SAML Source that has the option Verify Asser…EPSS 0.31%

Source: NIST National Vulnerability Database (record CVE-2026-42849), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.