High 7.5Published Oct 20, 2026

CVE-2026-111765A2A Java SDK: Android synchronous POST forwards credentials across authorities after incomplete redirect fix

Updated under an hour ago (2026-10-21 10:00 UTC)

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Every CVE for a2aproject a2a-java

Exploited in the last 30 days

A2A Java SDK is the official Java SDK for the Agent2Agent (A2A) Protocol. Starting in version 1.3.0.Final and prior to version 1.3.2.Final, the AndroidA2AHttpClient synchronous POST path overrides the disabled-redirect setting in AndroidA2AHttpClient.createConnection() with the PostBuilder default followRedirects value of true, leaving a residual of the earlier credential-redirect fix. JSONRPCTransport and RestTransport add interceptor-produced authentication headers and call synchronous post() without disabling redirects. AuthInterceptor permits X-API-Key, API-Key, X-Auth-Token, and X-Authentication headers; Android's repackaged OkHttp strips Authorization on cross-authority redirects but retains these nonstandard headers, disclosing a complete configured API key or token to another authority. The additional exposure applies when redirect or front-door behavior is compromised separately from the credential-handling component, or those components operate in different trust domains; a completely malicious initial origin already receives the credential on the first request. Autonomous clients require no human action, while user-invoked workflows can require interaction. Explicit followRedirects(false) prevents the redirected request. The demonstrated impact is credential disclosure, not subsequent credential use, integrity or availability impact, code execution, or host compromise. This issue is fixed in version 1.3.2.Final.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-522
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 20, 2026
First seen by InfoSec Signals: Oct 20, 2026

Affected products

Affected products

a2aproject a2a-java a2aproject:a2a_java (from the name)	from 1.3.0.Final, < 1.3.2.Final	CNA record

References

https://github.com/a2aproject/a2a-java/security/advisories/GHSA-4fpj-g9jf-9rggx-refsource-confirm
https://github.com/a2aproject/a2a-java/security/advisories/GHSA-9rhm-2h4x-jwmxx-refsource-misc
https://github.com/a2aproject/a2a-java/pull/1141x-refsource-misc
https://github.com/a2aproject/a2a-java/commit/2a36530d75e11bcf9b81f543464dbe193ca6478ex-refsource-misc
https://github.com/a2aproject/a2a-java/commit/3ae82912a106a6765d7b78042b0ef96e6c2e29b5x-refsource-misc
https://github.com/a2aproject/a2a-java/blob/30e31086e24bea096b5f662088661269c9119100/SECURITY.md#L335-L342x-refsource-misc
https://github.com/a2aproject/a2a-java/releases/tag/v1.3.2.Finalx-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.