Vulnary
← back to the feed
Critical· 9.8official fix available

CVE-2026-49448

CVE-2026-49448 is a critical vulnerability in authentik (an open-source identity provider) where an attacker can bypass the Source stage by sending an empty POST request. This flaw affects versions prior to 2025.12.6, 2026.2.4, and 2026.5.1, allowing potential unauthorized access. A fix is available in the patched versions.

publishedJun 2, 2026
last modifiedJul 22, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
33th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 24, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Users of goauthentik authentik before versions 2025.12.6, 2026.2.4, or 2026.5.1

02

Real-world impact

Attackers could exploit this to bypass authentication mechanisms, potentially gaining unauthorized access to systems.

03

Why this severity

CVSS 9.8 (critical) due to high confidence, impact, and ease of exploitation via a simple empty POST.

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade authentik to version 2025.12.6 or later.
  2. 02Alternatively, upgrade to version 2026.2.4 or 2026.5.1 if earlier versions are unavailable.
  3. 03Ensure the service restarts after applying the update to activate the fix.

NVD-referenced vendor advisory

05

Timeline

  1. Jun 2, 2026 · Jun 2, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 22, 2026 · 13d ago
    Advisory updated
    The NVD record was last revised.
  3. Jul 25, 2026 · 11d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →