Jan 1, 2026·6 min read·83 visits
IBM API Connect has a CVSS 9.8 hole in its Developer Portal. If 'self-service sign-up' is enabled, the authentication logic fails to properly validate user creation requests. This allows remote attackers to bypass identity verification entirely, potentially registering as administrators or hijacking existing accounts without credentials. IBM has released iFixes; immediate patching or disabling sign-up is required.
A critical authentication bypass in IBM API Connect's Developer Portal allows unauthenticated attackers to hijack accounts or create admin users simply by manipulating the self-service sign-up flow.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H| Product | Affected Versions | Fixed Version |
|---|---|---|
IBM API Connect IBM | 10.0.8.0 - 10.0.8.5 | 10.0.8.5-iFix |
IBM API Connect IBM | 10.0.11.0 | 10.0.11.0-iFix |
| Attribute | Detail |
|---|---|
| CWE | CWE-305 (Authentication Bypass) |
| CVSS v3.1 | 9.8 (Critical) |
| Attack Vector | Network (Remote) |
| Privileges Required | None |
| EPSS Score | 0.37% (Low/Emerging) |
| Exploit Status | No Public PoC / Internal Discovery |
Authentication Bypass by Primary Weakness
A remote code execution vulnerability exists in Microsoft .NET due to untrusted data deserialization within the PresentationCore component. The flaw stems from implicit auto-conversion flags during clipboard data retrieval operations.
An out-of-bounds write vulnerability in Microsoft .NET Framework, .NET runtime, and Visual Studio allows unauthenticated remote attackers to execute arbitrary code via crafted pixel-shader bytecode or auto-converted clipboard payloads.
ASP.NET Core contains a thread deadlock vulnerability (CWE-833) that allows an unauthenticated remote attacker to cause a denial of service over the network by exhausting server thread pool resources.
CVE-2026-70035 is a high-severity Remote Code Execution (RCE) vulnerability in Microsoft .NET Framework, .NET runtime, and Visual Studio caused by improper handling during the deserialization of untrusted data (CWE-502). An unauthenticated attacker can execute arbitrary code within the context of the affected process by delivering a crafted serialized payload.
An elevation of privilege vulnerability exists in ASP.NET Core and Microsoft Visual Studio due to improper synchronization during concurrent thread execution. Authenticated remote attackers with low privileges can exploit a timing window to manipulate shared resources and assume higher-level execution contexts.
A path traversal vulnerability (CWE-22) in Contao CMS allows unauthenticated remote attackers to bypass directory boundary restrictions in ImagesController and access files within the project directory.