a2aproject a2a-python Push Notification Sender base_push_notification_sender.py _dispatch_notification server-side request forgery (CVE-2026-90790) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90790

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

Answer in brief

CVE-2026-90790 records a Unknown severity vulnerability in a2aproject a2a-python Push Notification Sender base_push_notification_sender.py _dispatch_notification server-side request forgery. The current sources do not mark it as known exploited. The current feed maps a2aproject/a2a-python (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 14, 2026Updated Sep 14, 2026Source checked Sep 14, 2026First seen by HOL Sep 14, 2026Material review Sep 14, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps a2aproject/a2a-python (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
a2aproject/a2a-pythongeneric	1.1.0 \|\| 1.1.1 \|\| 1.1.2 \|\| 1.1.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for a2aproject/a2a-python.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 14, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.