EUVD-2026-78090
GHSA-vmmr-97qx-h8c4
Severity by source
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (VulDB) · only source for this CVE.
CVSS VectorVendor: VulDB
Lifecycle Timeline
2DescriptionCVE.org
A security vulnerability has been detected in a2aproject a2a-java 1.2.0. The impacted element is the function AuthorizationRequestHandlerDecorator.onListTasks of the file server-common/src/main/java/org/a2aproject/sdk/server/requesthandlers/AuthorizationRequestHandlerDecorator.java. Such manipulation leads to missing authorization. The attack can be launched remotely. Upgrading to version 1.3.0 is sufficient to resolve this issue. The name of the patch is e9a1abf9c90c02b16d17293afdc3cc2f555d63a6. The affected component should be upgraded.
AnalysisAI
Missing authorization in the A2A Java SDK (a2aproject/a2a-java) 1.2.0 allows a caller with a valid account to invoke the ListTasks operation without the list-scoped read check that guards other task operations, so task listings are returned to principals that the configured TaskAuthorizationProvider may have intended to reject entirely. The flaw lives in AuthorizationRequestHandlerDecorator.onListTasks in server-common, which delegated to the handler without first consulting the authorization provider for the list scope, leaving protection to per-task filtering inside the TaskStore. …
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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