CVE-2026-94613
highpriority · track · 0EPSS 0.006 · 50 %ileUSEPSS · scored 2026-10-23
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- BIT-authentik-2026-94613authentik: Denial of Service via Document Type Declarations in SAML Messages2026-10-01vendor · osvUS
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.
also known as (1)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (15) nvd
External citations — patches, advisories, analysis.
- https://docs.goauthentik.io/releases/2026.2#fixed-in-202627
- https://docs.goauthentik.io/releases/2026.5#fixed-in-202657
- https://docs.goauthentik.io/releases/2026.8#fixed-in-202682
- https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86
- https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac
- https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f
- https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d
- https://github.com/goauthentik/authentik/pull/25959
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