CVE-2026-90819 a2aproject a2a-java - HTTP Response Splitting

a2aproject a2a-java 1.2.0 contains an HTTP response splitting vulnerability caused by improper Authorization Header Construction in BasePushNotificationSender.dispatchNotification, letting remote attackers manipulate HTTP responses, exploit requires crafted requests.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.66% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
HTTP Response Splitting
Impact
HTTP Request Smuggling
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-93

Vendor fix

Upgrade to version 1.3.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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