CVE-2026-49448Public exploitNetwork attack vectorHinoki check available

Authentication bypass via empty Source-stage POST

Published Jun 2, 2026 · Updated Jun 2, 2026

Improper authentication in authentik before 2025.12.6, 2026.2.4, and 2026.5.1 allows remote attackers to bypass a Source stage. An empty POST causes the Source stage to advance the flow without authenticating against the configured source. Exposure requires a reachable flow with a bound Source stage whose source exposes ui_login_button; exploitation skips authentication at that source.

CVSS severity9.8
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authentication in authentik before 2025.12.6, 2026.2.4, and 2026.5.1 allows remote attackers to bypass a Source stage. An empty POST causes the Source stage to advance the flow without authenticating against the configured source. Exposure requires a reachable flow with a bound Source stage whose source exposes ui_login_button; exploitation skips authentication at that source.

The record

CVE
CVE-2026-49448
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
Authentik Security Inc.
Product
authentik
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2025.12.6
  2. Affected versionversion=< 2026.2.4
  3. Affected versionversion=< 2026.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Authentik Security Inc. · authentikversion=< 2025.12.6; version=< 2026.2.4; version=< 2026.5.1

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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