What is CVE-2026-90819?

CVE-2026-90819 is a high-severity vulnerability in A2aproject A2a-Java, classified under CRLF Injection. CVSS score: 7.3/10. Published 2026-09-14.

How severe is CVE-2026-90819?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in A2aproject A2a-Java

CVE-2026-90819

A weakness has been identified in a2aproject a2a-java 1.2.0. The affected element is the function BasePushNotificationSender.dispatchNotification of the file server-common/src/main/java/org/a2aproject/sdk/server/tasks/BasePushNotificationSender.java of the component Authorization Header Construction. This manipulation causes http response splitting. The attack can be initiated remotely. Upgrading to version 1.3.0 is sufficient to fix this issue. Patch name: 247a655043f145f6f8e3853724b6a543eaa02001. You should upgrade the affected component.

Vulnerability class: CRLF Injection

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

A2aproject A2a-java — versions 1.2.0

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (issue-tracking, patch)
cna@vuldb.com (issue-tracking, patch)
cna@vuldb.com (patch)
cna@vuldb.com (patch)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2026-90819?: CVE-2026-90819 is a high-severity vulnerability in A2aproject A2a-Java, classified under CRLF Injection. CVSS score: 7.3/10. Published 2026-09-14.
How severe is CVE-2026-90819?: High severity. CVSS v3 base score is 7.3 out of 10.