CVE-2026-90790
Published:September 14, 2026
Updated:October 13, 2026
A security vulnerability has been detected in a2aproject a2a-python up to 1.1.3. This affects the function _dispatch_notification of the file src/a2a/server/tasks/base_push_notification_sender.py of the component Push Notification Sender. The manipulation of the argument push_info.url leads to server-side request forgery. Remote exploitation of the attack is possible. Upgrading to version 1.1.4 is able to mitigate this issue. It is suggested to upgrade the affected component.
Affected Packages
a2a-sdk (CONDA):
Affected version(s) >=0.3.10 <1.1.4Fix Suggestion:
Update to version 1.1.4https://github.com/a2aproject/a2a-python.git (GITHUB):
Affected version(s) >=v0.2.1a2 <v1.1.4Fix Suggestion:
Update to version v1.1.4a2a-sdk (PYTHON):
Affected version(s) >=0.2.1a2 <1.1.4Fix Suggestion:
Update to version 1.1.4Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
NOT DEFINED
CVSS v3
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Exploit Maturity
NOT DEFINED
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.37