CVE-2026-90790: Server-Side Request Forgery in a2aproject a2a-python
CVE-2026-90790 is a server-side request forgery (SSRF) vulnerability in the a2aproject a2a-python package up to version 1.1.3. The vulnerability exists in the _dispatch_notification function within the Push Notification Sender component, where manipulation of the push_info.url argument can lead to SSRF. Remote exploitation is possible. Upgrading to version 1.1.4 mitigates this issue.
AI Analysis
Technical Summary
The vulnerability CVE-2026-90790 affects the a2aproject a2a-python package versions 1.1.0 through 1.1.3. It is located in the _dispatch_notification function of src/a2a/server/tasks/base_push_notification_sender.py, specifically in the Push Notification Sender component. An attacker can manipulate the push_info.url argument to perform server-side request forgery, potentially causing the server to make unintended HTTP requests. The vulnerability is remotely exploitable. The vendor has released version 1.1.4 which addresses this issue.
Potential Impact
Successful exploitation of this SSRF vulnerability could allow an attacker to make arbitrary HTTP requests from the vulnerable server, potentially accessing internal resources or services not otherwise accessible. The CVSS 4.0 base score is 5.3, indicating a medium severity impact. There is no indication of known exploits in the wild at this time.
Mitigation Recommendations
Upgrade the a2aproject a2a-python package to version 1.1.4 or later to mitigate this vulnerability. No other specific mitigations are indicated. Patch status is confirmed as an official fix in version 1.1.4.
CVE-2026-90790: Server-Side Request Forgery in a2aproject a2a-python
Description
CVE-2026-90790 is a server-side request forgery (SSRF) vulnerability in the a2aproject a2a-python package up to version 1.1.3. The vulnerability exists in the _dispatch_notification function within the Push Notification Sender component, where manipulation of the push_info.url argument can lead to SSRF. Remote exploitation is possible. Upgrading to version 1.1.4 mitigates this issue.
CVSS v4.0
Score 5.3medium
Affected software
a2aproject
a2a-python
cpe:2.3:a:a2aproject:a2a-python:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-90790 affects the a2aproject a2a-python package versions 1.1.0 through 1.1.3. It is located in the _dispatch_notification function of src/a2a/server/tasks/base_push_notification_sender.py, specifically in the Push Notification Sender component. An attacker can manipulate the push_info.url argument to perform server-side request forgery, potentially causing the server to make unintended HTTP requests. The vulnerability is remotely exploitable. The vendor has released version 1.1.4 which addresses this issue.
Potential Impact
Successful exploitation of this SSRF vulnerability could allow an attacker to make arbitrary HTTP requests from the vulnerable server, potentially accessing internal resources or services not otherwise accessible. The CVSS 4.0 base score is 5.3, indicating a medium severity impact. There is no indication of known exploits in the wild at this time.
Mitigation Recommendations
Upgrade the a2aproject a2a-python package to version 1.1.4 or later to mitigate this vulnerability. No other specific mitigations are indicated. Patch status is confirmed as an official fix in version 1.1.4.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-13T13:24:51.272Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa808ea55bf5e2cf533c39e
Added to database: 09/14/2026, 14:47:06 UTC
Last enriched: 09/14/2026, 15:01:45 UTC
Last updated: 09/14/2026, 15:39:36 UTC
Views: 5
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