What’s Vulnerable › Vulnerabilities

CVE-2026-116477: a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-31
• Weakness: CWE-200

Description

A security vulnerability has been detected in a2aproject a2a-dotnet up to 1.0.0-preview2. The impacted element is the function A2AJsonRpcProcessor.ProcessRequestAsync of the file src/A2A.AspNetCore/A2AJsonRpcProcessor.cs of the component Parser. The manipulation leads to information exposure through error message. It is possible to initiate the attack remotely. Upgrading to version 1.0.0-preview3 is sufficient to resolve this issue. The identifier of the patch is ccbd12b6108a6a8f0fd5d8b4a9ece3c8a94ba1e4. Upgrading the affected component is recommended.

Affected products

• a2aproject a2a-dotnet: 1.0.0-preview2

References

• https://github.com/a2aproject/a2a-dotnet/
• https://github.com/a2aproject/a2a-dotnet/commit/ccbd12b6108a6a8f0fd5d8b4a9ece3c8a94ba1e4
• https://github.com/a2aproject/a2a-dotnet/pull/452
• https://github.com/a2aproject/a2a-dotnet/releases/tag/v1.0.0-preview3
• https://vuldb.com/cve/CVE-2026-116477
• https://vuldb.com/submit/1014890
• https://vuldb.com/vuln/426390
• https://vuldb.com/vuln/426390/cti

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