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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
a2aproject a2a-dotnet affected
Version Status Constraints
1.0.0-preview2 affected —
1.0.0-preview3 unaffected —

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Project Subscriptions

Vendors Products
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A2a-dotnet Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Mon, 26 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
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.
Title a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposure
First Time appeared A2aproject
A2aproject a2a-dotnet
Weaknesses CWE-200
CWE-209
CPEs cpe:2.3:a:a2aproject:a2a-dotnet:*:*:*:*:*:*:*:*
Vendors & Products A2aproject
A2aproject a2a-dotnet
References
Metrics cvssV2_0

{'score': 4, 'vector': 'AV:N/AC:L/Au:S/C:P/I:N/A:N/E:ND/RL:OF/RC:C'}

cvssV3_0

{'score': 4.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C'}

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-10-26T19:15:22.114Z

Reserved: 2026-10-26T10:59:40.497Z

Link: CVE-2026-116477

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-26T20:17:54.890

Modified: 2026-10-26T20:17:54.890

Link: CVE-2026-116477

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T21:00:10Z

Weaknesses