| Title | a2aproject a2a-go ≤ v2.4.0 CWE-209 |
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| Description | a2aproject a2a-go up to v2.4.0 discloses push notification credentials in error responses. In a2asrv/agentexec.go, CreateExecutor formats a failed push config store write with %v on params.Config.PushConfig, embedding the whole structure in the error message that is returned to the client in the JSON-RPC/REST error payload. This exposes the webhook token plus authentication.scheme and authentication.credentials, which are write-only by design and not returned by any other API operation. Triggering a store failure makes the caller receive those secrets, enabling unauthorized push delivery to an attacker endpoint or impersonation of the agent toward the webhook. CWE-209/CWE-200, fixed in v2.5.0 (PR #393). |
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| Source | ⚠️ https://github.com/a2aproject/a2a-go/pull/393 |
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| User | colorfullbz (UID 86308) |
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| Submission | 10/06/2026 03:55 (23 days ago) |
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| Moderation | 10/26/2026 12:00 (20 days later) |
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| Status | Accepted |
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| VulDB entry | 426391 [a2aproject a2a-go up to 2.4.0 Push Notification a2asrv/agentexec.go CreateExecutor information exposure] |
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| Points | 20 |
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