TI-2026-61697 Aliases CVE-2026-90790 GHSA-33c5-chm5-2ggp

Server-side request forgery in a2aproject a2a-python

LOW 24CWE-918Published 2026-09-14 · Updated 2026-09-15

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: Low · Low · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00374 31st percentileScored 2026-11-07

Fix Fixed a2a-python (a2aproject): 1.1.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
a2aproject	a2a-python	1.1.0; 1.1.1; 1.1.2; 1.1.3	1.1.4	Patch available	CNA

a2a-python Vendora2aproject Affected 1.1.0; 1.1.1; 1.1.2; 1.1.3 Fixed in 1.1.4 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:a2aproject:a2a-python::::::::	—	—	a2aproject

cpe:2.3:a:a2aproject:a2a-python:*:*:*:*:*:*:*:* Versions — — ·a2aproject

Remediation

Fix · CNA a2a-python (a2aproject) Fixed in 1.1.4

Timeline

2026-10-02 Threatist record created from CVE-2026-90790
2026-10-03 Alias added: GHSA-33c5-chm5-2ggp

References

Patch 3

Other 1

https://github.com/a2aproject/a2a-python/

TI-2026-76905 Android A2A Java SDK forwards API keys across redirects CVSS 3.1HIGH 7.5
TI-2026-76904 A2A Java SDK default task store skips authorization on task reads CVSS 3.1HIGH 7.5
TI-2026-76847 Server-side request forgery in A2A Java SDK push notifications CVSS 3.1MEDIUM 5.8
TI-2026-81183 Resource consumption in a2aproject a2a-go REST SSE handler CVSS 4.0MEDIUM 6.9
TI-2026-61722 HTTP response splitting in a2aproject a2a-java CVSS 4.0MEDIUM 6.9
TI-2026-81185 Denial of service in a2aproject a2a-go Distributed Manager Cancel CVSS 4.0MEDIUM 6.9

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences