How severe is CVE-2026-33875?

CVE-2026-33875 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-33875 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33875?

CVE-2026-33875 affects Gematik Authenticator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33875?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-33875 have an EU (EUVD) identifier?

Yes. CVE-2026-33875 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16817.

When was CVE-2026-33875 published?

CVE-2026-33875 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-33875

CVE-2026-33875 is a critical-severity vulnerability in Gematik Authenticator with a CVSS 3.x base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-940.

Key facts

Severity: Critical (CVSS 3.x base score 9.3)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16817
Weakness: CWE-940
Affected product: Gematik Authenticator
Published: 2026-03-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-33875?: CVE-2026-33875 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-33875 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33875?: CVE-2026-33875 affects Gematik Authenticator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33875?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-33875 have an EU (EUVD) identifier?: Yes. CVE-2026-33875 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16817.
When was CVE-2026-33875 published?: CVE-2026-33875 was published on 2026-03-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gematik:authenticator:*:*:*:*:*:*:*:*

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