Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M
CVE-2026-33875Authenticator Vulnerable to Authentication Flow Hijack
Critical 9.3
In plain English
A critical-severity security flaw in app-Authenticator from gematik. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| gematik | app-Authenticator | < 4.16.0 |
Weakness: CWE-940 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N