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CVE

CVE-2026-25922

authentik has a Signature Verification Bypass via SAML Assertion Wrapping
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CVE

CVE-2026-25922

authentik has a Signature Verification Bypass via SAML Assertion Wrapping

authentik 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 Assertion Signature under Verification Certificate enabled and not Verify Response Signature, or does not have the Encryption Certificate setting under Advanced Protocol settings configured, it was possible for an attacker to inject a malicious assertion before the signed assertion that authentik would use instead. authentik 2025.8.6, 2025.10.4, and 2025.12.4 fix this issue.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25922.json, https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4, https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4, https://github.com/goauthentik/authentik/releases/tag/version%2F2025.8.6, https://github.com/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4, https://nvd.nist.gov/vuln/detail/CVE-2026-25922

Severity

8.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.8
EPSS Probability
0.0001%
EPSS Percentile
0.00993%
Introduced Version
0,6d1c7f90e2da9c2c4bc27a6c8784c4130e6fe822
Fix Available
bce6ba2afa6e021cfb5a8aa6c0e25d97fb7cf254,19ad8d3ae3f266ec1096bc4461fdf6bcda1aa079

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