CVE-2026-94613
authentik: Denial of Service via Document Type Declarations in SAML Messages
Description
authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling /application/saml/* or /source/saml/*, causing the requests assigned to that worker to fail. Worker process termination and automatic restart do not destroy database-backed sessions, but continued malicious messages can cause a sustained share of legitimate traffic to fail. Other protocol implementations are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2.
INFO
Published Date :
Sept. 24, 2026, 5:17 p.m.
Last Modified :
Sept. 25, 2026, 1:22 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update authentik to version 2026.2.7 or later.
- Apply updates for identity-provider or SAML source roles.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-94613.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-94613 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-94613
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-94613 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-94613 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Sep. 24, 2026
Action Type Old Value New Value Added Description authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling /application/saml/* or /source/saml/*, causing the requests assigned to that worker to fail. Worker process termination and automatic restart do not destroy database-backed sessions, but continued malicious messages can cause a sustained share of legitimate traffic to fail. Other protocol implementations are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/94xxx/CVE-2026-94613.json">CVE-2026-94613</a> Added Reference https://docs.goauthentik.io/releases/2026.2#fixed-in-202627 Added Reference https://docs.goauthentik.io/releases/2026.5#fixed-in-202657 Added Reference https://docs.goauthentik.io/releases/2026.8#fixed-in-202682 Added Reference https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86 Added Reference https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac Added Reference https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f Added Reference https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d Added Reference https://github.com/goauthentik/authentik/pull/25959 Added Reference https://github.com/goauthentik/authentik/pull/25964 Added Reference https://github.com/goauthentik/authentik/pull/25969 Added Reference https://github.com/goauthentik/authentik/pull/25974 Added Reference https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7 Added Reference https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7 Added Reference https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2 Added Reference https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm