CVE-2026-33875 | Gematik app-Authenticator up to 4.15.x verification of source (GHSA-qg87-cf56-2rmr)

VDB-354055 · CVE-2026-33875 · GHSA-QG87-CF56-2RMR GEMATIK APP-AUTHENTICATOR UP TO 4.15.X VERIFICATION OF SOURCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.6 $0-$5k 4.28- Summaryinfo A vulnerability identified as critical has been detected in Gematik app-Authenticator up to 4.15.x. This impacts an unknown function. This manipulation causes verification of source. This vulnerability is registered as CVE-2026-33875. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component. Detailsinfo A vulnerability has been found in Gematik app-Authenticator up to 4.15.x and classified as critical. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a verification of source vulnerability. The CWE definition for the vulnerability is CWE-940. The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: 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. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-33875 since 03/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. Upgrading to version 4.16.0 eliminates this vulnerability. Productinfo Vendor Gematik Name app-Authenticator Version 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15 Website Product: https://github.com/gematik/app-Authenticator/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.8 VulDB Meta Temp Score: 7.6 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 9.3 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Verification of source CWE: CWE-940 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: app-Authenticator 4.16.0 Timelineinfo 03/24/2026 CVE reserved 03/27/2026 +3 days Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-qg87-cf56-2rmr Status: Confirmed CVE: CVE-2026-33875 (🔒) GCVE (CVE): GCVE-0-2026-33875 GCVE (VulDB): GCVE-100-354055 Entryinfo Created: 03/27/2026 23:51 Changes: 03/27/2026 23:51 (63) Complete: 🔍 Cache ID: 99:F0D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸