CVE-2026-33875: Gematik Authenticator securely authenticates users for login to digital health applications

Q: How do I fix CVE-2026-33875?

authenticator: upgrade to 4.16.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33875 being exploited?

CVE-2026-33875 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33875 affect?

CVE-2026-33875 affects authenticator. Severity is critical (CVSS 9.3). 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 vic

Q: How urgent is CVE-2026-33875?

Priority 37/100. Critical severity

This month

CRITICAL 9.3UPGRADE

CVE-2026-33875 is a critical-severity flaw (CVSS 9.3) affecting authenticator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-940
Published	2026-03-27
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: gematik

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-27 21:17 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

gematik authenticator UPGRADE

Affected: < 4.16.0

Fixed in: 4.16.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy authenticator || rpm -q authenticator || authenticator --version

2. UPGRADE to 4.16.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade authenticator

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade authenticator

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33875?

authenticator: upgrade to 4.16.0. Exact commands for each OS are on this page.

Is CVE-2026-33875 being exploited?

CVE-2026-33875 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33875 affect?

CVE-2026-33875 affects authenticator. Severity is critical (CVSS 9.3). 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 vic

How urgent is CVE-2026-33875?

Priority 37/100. Critical severity

Related CVEs

CVE-2026-41615 CRITICAL 9.6 UPGRADE UPGRADE Exposure of sensitive information to an unauthorized actor in Microsoft Authenticator allows an unauthorized a
CVE-2026-33874 HIGH 7.8 UPGRADE Gematik Authenticator securely authenticates users for login to digital health applications
CVE-2026-80097 HIGH 8.6 UPGRADE Improper authentication in Microsoft Authenticator allows an unauthorized attacker to elevate privileges local

References

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