CVE-2026-25922 json
authentik has a Signature Verification Bypass via SAML Assertion Wrapping
published 8mo ago modified 2mo ago also BIT-authentik-2026-25922 , EUVD-2026-6701 , GHSA-jh35-c4cc-wjm4
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami authentik 2025.8.6, 2025.12.4
- goauthentik authentik 2025.8.6, 2025.10.4, 2025.12.4
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 8mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | authentik | <2025.8.6 >=2025.10.0, <2025.12.4 |
2025.8.6 2025.12.4 |
Affected products
- goauthentik authentik
Classification
References
-
github.com
/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4
mitigation, vendor-advisory, advisory
-
github.com
/goauthentik/authentik/releases/tag/version%2F2025.10.4
product, release-notes, article
-
github.com
/goauthentik/authentik/releases/tag/version%2F2025.12.4
product, release-notes, article
-
github.com
/goauthentik/authentik/releases/tag/version%2F2025.8.6
product, release-notes, article
-
nvd.nist.gov
/vuln/detail/CVE-2026-25922
web
Sources
- CVE List CVE-2026-25922
- NVD CVE-2026-25922
- OSV BIT-authentik-2026-25922
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.