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CVE-2026-40172

authentik is an open-source identity provider. In versions prior to 2025.12.5 and 2026.2.0-rc1 through 2026.2.2, the PATCH /api/v3/core/users/{pk}/ API allows a caller with change_user on a target user to assign arbitrary groups through UserSerializer, including groups with is_superuser=True, without requiring enable_group_superuser, leading to privilege escalation. This bypasses the stricter permission model enforced in group-management paths and enables delegated user-management permissions to
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e58c8887f28906524baf852c978a676283654425b5445205ddf4f7b6bfe965c1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"authentik","vendor":"goauthentik","versions":[{"status":"affected","version":"< 2025.12.5"},{"status":"affected","version":">= 2026.2.0-rc1, < 2026.2.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1c6564b6b218c90bea392f81ddc2e0a9aeb2816edbdb446d7f4f546367d61524 · sha256:25014531cbcc5d38… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1c6564b6b218c90bea392f81ddc2e0a9aeb2816edbdb446d7f4f546367d61524 · sha256:25014531cbcc5d38… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c6564b6b218c90bea392f81ddc2e0a9aeb2816edbdb446d7f4f546367d61524 · sha256:25014531cbcc5d38… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.5","tags":["x_refsource_MISC"],"url":"https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c6564b6b218c90bea392f81ddc2e0a9aeb2816edbdb446d7f4f546367d61524 · sha256:25014531cbcc5d38… · /containers/cna/references/1
{"name":"https://github.com/goauthentik/authentik/releases/tag/version%2F2026.2.3","tags":["x_refsource_MISC"],"url":"https://github.com/goauthentik/authentik/releases/tag/version%2F2026.2.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c6564b6b218c90bea392f81ddc2e0a9aeb2816edbdb446d7f4f546367d61524 · sha256:25014531cbcc5d38… · /containers/cna/references/2
{"name":"https://github.com/goauthentik/authentik/security/advisories/GHSA-h6x7-hjjc-wjc9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/goauthentik/authentik/security/advisories/GHSA-h6x7-hjjc-wjc9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c6564b6b218c90bea392f81ddc2e0a9aeb2816edbdb446d7f4f546367d61524 · sha256:25014531cbcc5d38… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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