What is the CVSS score of EUVD-2026-16816?

EUVD-2026-16816 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of App Authenticator are affected by EUVD-2026-16816?

gematik Authenticator for macOS (versions 4.12.0-4.15.x) contains a remote code execution vulnerability triggered by opening malicious documents, directly impacting German healthcare organizations…. A patch is available.

How to fix or mitigate EUVD-2026-16816?

Within 24 hours: Inventory all macOS deployments running gematik Authenticator versions 4.12.0-4.15.x and identify affected users in healthcare IT departments. Within 7 days: Update gematik Authenticator to the patched version released by vendor (consult gematik advisory for exact build number). Within 30 days: Deploy user awareness training emphasizing avoidance of untrusted document sources and validate update completion across all endpoints.

App Authenticator EUVD-2026-16816

| CVE-2026-33874 HIGH

OS Command Injection (CWE-78)

2026-03-27 GitHub_M

RCE Command Injection App Authenticator

7.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.8 HIGH

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 21, 2026 - 19:22 vuln.today

cvss_changed

Analysis Updated

Apr 16, 2026 - 06:12 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

4.16.0

EUVD ID Assigned

Mar 27, 2026 - 21:15 euvd

EUVD-2026-16816

Analysis Generated

Mar 27, 2026 - 21:15 vuln.today

CVE Published

Mar 27, 2026 - 20:23 nvd

HIGH 7.8

DescriptionGitHub Advisory

Gematik Authenticator securely authenticates users for login to digital health applications. Starting in version 4.12.0 and prior to version 4.16.0, the Mac OS version of the Authenticator is vulnerable to remote code execution, triggered when victims open a malicious file. Update the gematik Authenticator to version 4.16.0 or greater to receive a patch. There are no known workarounds.

AnalysisAI

Remote code execution in gematik Authenticator (macOS) versions 4.12.0 through 4.15.x enables malicious file-triggered command injection when victims open crafted documents. This CWE-78 OS command injection flaw requires no authentication but depends on user interaction (CVSS:3.1/AV:L/AC:L/PR:N/UI:R). No public exploit identified at time of analysis, though EPSS data not available. The authenticator serves German digital health applications, making this a high-impact target for healthcare sector attacks.

Technical ContextAI

The vulnerability stems from CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS command injection. The gematik Authenticator is a security-critical component for German healthcare infrastructure, providing authentication services for digital health applications (ePA, E-Rezept systems). The affected CPE (cpe:2.3:a:gematik:app-authenticator) confirms this impacts the macOS client specifically. Command injection vulnerabilities occur when applications pass unsanitized user-supplied input to system shell commands, allowing attackers to execute arbitrary commands with the privileges of the vulnerable application. In this case, the attack vector is local (AV:L), meaning it requires the malicious file to be opened on the victim's system rather than remote network exploitation, but the PR:N (no privileges required) indicates any local user can trigger it without needing elevated permissions beforehand.

RemediationAI

Vendor-released patch: version 4.16.0. Users must upgrade gematik Authenticator to version 4.16.0 or later to eliminate this vulnerability. Download the patched version from official gematik distribution channels. The vendor advisory explicitly states no workarounds exist, making upgrading the only effective mitigation. Healthcare organizations should prioritize deployment to all macOS users with access to digital health systems, particularly those handling electronic patient records (ePA) or e-prescription (E-Rezept) services. Implement endpoint detection controls to identify and block suspicious file types if immediate patching faces deployment delays, though this provides only partial protection. Complete remediation guidance is available at https://github.com/gematik/app-Authenticator/security/advisories/GHSA-mjgm-7hwc-qqcr.