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TI-2026-26236 Aliases CVE-2026-33875

Authenticator Vulnerable to Authentication Flow Hijack

Priority MEDIUM 42CWE-940Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Gematik Authenticator securely authenticates users for login to digital health applications. Versions prior to 4.16.0 are vulnerable to authentication flow hijacking, potentially allowing attackers to authenticate with the identities of victim users who click on a malicious deep link. Update Gematik Authenticator to version 4.16.0 or greater to receive a patch. There are no known workarounds.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Fix Fixed app-Authenticator (gematik): 4.16.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gematikapp-Authenticatorbefore 4.16.04.16.0Patch availableCNA
  • app-Authenticator Vendorgematik Affected before 4.16.0 Fixed in 4.16.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gematik:authenticator:*:*:*:*:*:*:*:*before 4.16.0Vulnerablegematik
  • cpe:2.3:a:gematik:authenticator:*:*:*:*:*:*:*:* Versions before 4.16.0 Vulnerable ·gematik

Remediation

  • Fix · CNA app-Authenticator (gematik) Fixed in 4.16.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33875

References

Advisory 1

  • TI-2026-26235 Authenticator vulnerable to Remote Code Execution CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences