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.
What this means for your business
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.4% chance of attack attempts being seen in the next 30 days, ranking above 32% of all known flaws.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
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Scoring
- CVSS
- 7.3 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- CVSS v4
- 6.9
- Weakness
- CWE-93
- Assigned by
- cna@vuldb.com
Dates
- Published
- 2026-09-14
- Last modified
- 2026-09-15
- Sources
- NVD
References
- https://github.com/a2aproject/a2a-java/
- https://github.com/a2aproject/a2a-java/commit/247a655043f145f6f8e3853724b6a543eaa02001
- https://github.com/a2aproject/a2a-java/pull/1043
- https://github.com/a2aproject/a2a-java/pull/1053
- https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final
- https://vuldb.com/cve/CVE-2026-90819
- https://vuldb.com/submit/922996
- https://vuldb.com/vuln/403322
- https://vuldb.com/vuln/403322/cti