What is CVE-2026-33875?

CVE-2026-33875 is a critical-severity vulnerability in Gematik App-authenticator, classified under Improper Verification of Source of a Communication Channel. CVSS score: 9.3/10. Published 2026-03-27.

How severe is CVE-2026-33875?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Vulnerability in Gematik App-authenticator

CVE-2026-33875

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 vi…

EPSS: 0.001 (25.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Gematik App-authenticator — versions < 4.16.0

Weakness classification (CWE)

CWE-940 — Improper Verification of Source of a Communication Channel

References

https://github.com/gematik/app-Authenticator/security/advisories/GHSA-qg87-cf56-2rmr (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-33875?: CVE-2026-33875 is a critical-severity vulnerability in Gematik App-authenticator, classified under Improper Verification of Source of a Communication Channel. CVSS score: 9.3/10. Published 2026-03-27.
How severe is CVE-2026-33875?: Critical severity. CVSS v3 base score is 9.3 out of 10.