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Vulnerability Details :

CVE-2026-33875

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-27 Mar, 2026 | 20:25
Updated At-03 Apr, 2026 | 15:21
Rejected At-
Credits

Authenticator Vulnerable to Authentication Flow Hijack

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:27 Mar, 2026 | 20:25
Updated At:03 Apr, 2026 | 15:21
Rejected At:
▼CVE Numbering Authority (CNA)
Authenticator Vulnerable to Authentication Flow Hijack

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
Vendor
gematik
Product
app-Authenticator
Versions
Affected
  • < 4.16.0
Problem Types
TypeCWE IDDescription
CWECWE-940CWE-940: Improper Verification of Source of a Communication Channel
Type: CWE
CWE ID: CWE-940
Description: CWE-940: Improper Verification of Source of a Communication Channel
Metrics
VersionBase scoreBase severityVector
3.19.3CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Version: 3.1
Base score: 9.3
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/gematik/app-Authenticator/security/advisories/GHSA-qg87-cf56-2rmr
x_refsource_CONFIRM
Hyperlink: https://github.com/gematik/app-Authenticator/security/advisories/GHSA-qg87-cf56-2rmr
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
1. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
2. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.machinespirits.com/advisory/f41e56/
N/A
Hyperlink: https://www.machinespirits.com/advisory/f41e56/
Resource: N/A
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:27 Mar, 2026 | 21:17
Updated At:03 Apr, 2026 | 16:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.19.3CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 9.3
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CPE Matches

gematik
gematik
>>authenticator>>Versions before 4.16.0(exclusive)
cpe:2.3:a:gematik:authenticator:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-940Secondarysecurity-advisories@github.com
CWE ID: CWE-940
Type: Secondary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/gematik/app-Authenticator/security/advisories/GHSA-qg87-cf56-2rmrsecurity-advisories@github.com
Vendor Advisory
https://www.machinespirits.com/advisory/f41e56/af854a3a-2127-422b-91ae-364da2661108
N/A
Hyperlink: https://github.com/gematik/app-Authenticator/security/advisories/GHSA-qg87-cf56-2rmr
Source: security-advisories@github.com
Resource:
Vendor Advisory
Hyperlink: https://www.machinespirits.com/advisory/f41e56/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A

Change History

0
Information is not available yet

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