CVE-2026-90819

a2aproject a2a-java Authorization Header Construction BasePushNotificationSender.java BasePushNotificationSender.dispatchNotification response splitting

HIGH
7.3
CVSS Score
Published: September 14, 2026 at 08:30 PM UTC
Updated: September 15, 2026 at 03:17 PM UTC
1 product affected across 1 vendorA2A Java

Using a2a-java by a2aproject?

Get instant alerts when new vulnerabilities affect a2a-java - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.3
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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.

Affected

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

Vendor states this is fixed in 1.3.0 (unaffected)

References (9)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/403322
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/403322/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-90819
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/922996
Issue TrackingPatch
Source: cverecord
https://github.com/a2aproject/a2a-java/pull/1043
Issue TrackingPatch
Source: cverecord
https://github.com/a2aproject/a2a-java/pull/1053

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

7.3HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-113CWE-93

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card