Miggo at BlackHat 2026!
Easily map the attack path and prioritize which CVEs are a threat to your organization
Miggo AIGenerate vendor-ready rules for the observed attack patterns, plus reasoning and safe deployment guidance
Miggo AIRoot Cause AnalysisThe vulnerability stems from improper handling of compressed JWE tokens in authentication flow. Key functions involved in JWT/JWE processing were identified through: 1) The advisory's focus on JWT-based authentication components 2) CWE-400's resource consumption pattern 3) Microsoft's guidance to update specific authentication packages 4) The attack vector requiring token decompression. These functions handle critical decompression operations without proper size validation, allowing small malicious inputs to cause massive memory allocations. The high confidence comes from the direct correlation between these functions' responsibilities and the described vulnerability mechanism.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| System.IdentityModel.Tokens.Jwt | nuget | < 5.7.0 | 5.7.0 |
| System.IdentityModel.Tokens.Jwt | nuget | >= 6.5.0, < 6.34.0 | 6.34.0 |
| System.IdentityModel.Tokens.Jwt | nuget | >= 7.0.0-preview, < 7.1.2 | 7.1.2 |
| Microsoft.IdentityModel.JsonWebTokens | nuget | < 5.7.0 | 5.7.0 |
| Microsoft.IdentityModel.JsonWebTokens | nuget | >= 6.5.0, < 6.34.0 | 6.34.0 |
| Microsoft.IdentityModel.JsonWebTokens | nuget | >= 7.0.0-preview, < 7.1.2 | 7.1.2 |
