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CVE-2026-90790— a2aproject a2a-python Push Notification Sender base_push_notification_sender.py _dispatch_notification server-side request forgery

Quick assessment

Affected
a2aproject a2a-python
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 a2a-python 项目（版本 1.1.3 及更早版本）中检测到一项安全漏洞。该漏洞位于 组件中，具体影响文件 中的 函数。对参数 的操控可导致服务端请求伪造（Server-Side Request Forgery, SSRF）。该漏洞可被远程利用。升级到 1.1.4 版本可缓解此问题，建议升级受影响的组件。

CVSS 6.3 · Medium
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I. Basic Information for CVE-2026-90790

Vulnerability Information
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Vulnerability Title
a2aproject a2a-python Push Notification Sender base_push_notification_sender.py _dispatch_notification server-side request forgery
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
a2aproject a2a-python 1.1.0 cpe:2.3:a:a2aproject:a2a-python:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-90790

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III. Intelligence Information for CVE-2026-90790

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Patches & Fixes for CVE-2026-90790 (2)

Vendor Pages for CVE-2026-90790 (1)

Other References for CVE-2026-90790 (1)

IV. Related Vulnerabilities

Same weakness: CWE-918

V. Comments for CVE-2026-90790

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