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CVE-2026-25922
authentik has a Signature Verification Bypass via SAML Assertion Wrapping
High8.8EPSS 0.24%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
- affected < 2025.8.6
- affected >= 2025.10.0-rc1, < 2025.10.4
- affected >= 2025.10.0-rc1, < 2025.12.4
References (4)
- https://github.com/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4 (opens in a new tab)x_refsource_MISC
- https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4 (opens in a new tab)x_refsource_MISC
- https://github.com/goauthentik/authentik/releases/tag/version%2F2025.8.6 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-25922)Record last updated .