CVE-2026-90790

a2aproject a2a-python Push Notification Sender base_push_notification_sender.py _dispatch_notification server-side request forgery

MEDIUM
6.3
CVSS Score
Published: September 14, 2026 at 02:30 PM UTC
Updated: September 15, 2026 at 02:17 PM UTC
1 product affected across 1 vendorA2A Python

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 1.1.4 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (8)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/403296
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/403296/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-90790
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/919747
Issue TrackingPatch
Source: cverecord
https://github.com/a2aproject/a2a-python/pull/1164
Issue TrackingPatch
Source: cverecord
https://github.com/a2aproject/a2a-python/pull/1169

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-918

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