# CVE-2026-90790

## Summary

- **CVE ID:** CVE-2026-90790
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X)
- **CWE:** CWE-918
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 15, 2026

## 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.

## Affected Products

- a2aproject — a2a-python (1.1.0)
- a2aproject — a2a-python (1.1.1)
- a2aproject — a2a-python (1.1.2)
- a2aproject — a2a-python (1.1.3)
- a2aproject — a2a-python (1.1.4)

## References

- [CNA](https://vuldb.com/vuln/403296)
- [CNA](https://vuldb.com/vuln/403296/cti)
- [CNA](https://vuldb.com/cve/CVE-2026-90790)
- [CNA](https://vuldb.com/submit/919747)
- [CNA](https://github.com/a2aproject/a2a-python/pull/1164)
- [CNA](https://github.com/a2aproject/a2a-python/pull/1169)
- [CNA](https://github.com/a2aproject/a2a-python/releases/tag/v1.1.4)
- [CNA](https://github.com/a2aproject/a2a-python/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.21%
- **EPSS Percentile:** 12.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._