CVE Explorer

CVE-2026-42849

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, due to the implementation of stages in the SFE (Simple Flow Executor) in order to make the interface more compatible with legacy browsers, it was possible to use an XSS exploit in the AutosubmitStage. This issue has been patched in versions 2025.12.5 and 2026.2.3.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fb21d038fbe8717b73701adb66bf03e63d02cc989c173403313002c9c1cc94b6

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"authentik","vendor":"goauthentik","versions":[{"status":"affected","version":"< 2025.12.5"},{"status":"affected","version":"< 2026.2.3"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:189c2607668efdb3fcec6fedd7fa96cf71b4f3de1d385522575ed886f5c20956 · sha256:fcd06d79333640be… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:189c2607668efdb3fcec6fedd7fa96cf71b4f3de1d385522575ed886f5c20956 · sha256:fcd06d79333640be… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:189c2607668efdb3fcec6fedd7fa96cf71b4f3de1d385522575ed886f5c20956 · sha256:fcd06d79333640be… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/goauthentik/authentik/security/advisories/GHSA-pgff-5mx8-fqj3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/goauthentik/authentik/security/advisories/GHSA-pgff-5mx8-fqj3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:189c2607668efdb3fcec6fedd7fa96cf71b4f3de1d385522575ed886f5c20956 · sha256:fcd06d79333640be… · /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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