`CVE-2026-111762`

Severity	5.7 Medium CVSS 4.0
Fixed in	`1.3.0.Final`
Weakness	CWE-532
Published	20 Oct 2026
Updated	28 Oct 2026

Published 25 days ago. NVD often adds the list of affected products days or weeks after a CVE is published, and the other sources we check lag too. The scope and status here may change.

Description

A2A Java SDK is the official Java SDK for the Agent2Agent (A2A) Protocol. Prior to 1.3.0.Final, RestHandler.parseRequestBody in transport/rest/src/main/java/org/a2aproject/sdk/transport/rest/handler/RestHandler.java logs the entire JSON request body at SEVERE level when JsonFormat.parser().merge() throws InvalidProtocolBufferException. With push notifications enabled, createTaskPushNotificationConfiguration reaches this parser for requests to /v1/tenants/{tenant}/tasks/{taskId}/pushNotificationConfigs, whose token and authentication.credentials fields can contain bearer tokens and authentication credentials for client push endpoints. A valid JSON body that fails protobuf deserialization, including an unknown field under strict parsing or a schema mismatch, causes those secrets to be written to the server logs in cleartext. An attacker with access to the server logs or a log aggregation system can retrieve the credentials and potentially use the credentials to send forged task status updates to the client's push notification endpoint. This issue is fixed in version 1.3.0.Final.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment exploitation: none
Indexed PoC none indexed
EPSS 0.17% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

Protection full Deserialization, Process
Action available security rule
Review automated Inferred
Record active

Decided by	A vulnerability class already blocked by an ARMR security rule
Finding	Protected by Waratek's ARMR deserialization security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's description identifies a deserialization vulnerability. Matched by description (CWE-532 was assigned, but does not settle the class on its own).
Candidate fix	https://github.com/a2aproject/a2a-java/commit/88827105fee0daaac0d883a4a68eb644571d7230 : a commit: the change itself

Decided by

A vulnerability class already blocked by an ARMR security rule

Finding

Protected by Waratek's ARMR deserialization security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's description identifies a deserialization vulnerability. Matched by description (CWE-532 was assigned, but does not settle the class on its own).

Candidate fix

https://github.com/a2aproject/a2a-java/commit/88827105fee0daaac0d883a4a68eb644571d7230 : a commit: the change itself

How to mitigate CVE-2026-111762

Upgrade the affected software to 1.3.0.Final or later. Until you can, Waratek RASP blocks exploitation with its deserialization and process rules. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

org.a2aproject.sdk:a2a-java-sdk-transport-rest 0 1.3.0.Final unbounded

Package	Introduced	Fixed	Last affected
`org.a2aproject.sdk:a2a-java-sdk-transport-rest`	0	`1.3.0.Final`	unbounded

Products and versions

1 product, 1 version entry

Source	Vendor	Product	Scheme	Affected versions
osv	org.a2aproject.sdk	a2a-java-sdk-transport-rest	generic	＜ 1.3.0

Source

Vendor

Product

Scheme

Affected versions

osv

org.a2aproject.sdk

a2a-java-sdk-transport-rest

generic

＜ 1.3.0

References

URL	Tags
https://github.com/a2aproject/a2a-java/commit/88827105fee0daaac0d883a4a68eb644571d7230	commit
https://github.com/a2aproject/a2a-java/security/advisories/GHSA-x32g-jvvm-4725	WEB
https://github.com/a2aproject/a2a-java	PACKAGE
https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final	WEB

URL

Timeline

Published	2026-10-20	By the CVE Program.
NVD record modified	2026-10-28	NVD's own last-modified date for this record.

Published

2026-10-20

By the CVE Program.

NVD record modified

2026-10-28

NVD's own last-modified date for this record.

How VRT decided (17 of 24 rules ran)

17 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification no match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side no match Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven matched In scope Maven packages: org.a2aproject.sdk:a2a-java-sdk-transport-rest

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint matched Mitigation candidate References include candidate fix URL (commit tier): https://github.com/a2aproject/a2a-java/commit/88827105fee0daaac0d883a4a68eb644571d7230

18 open-source-maven skipped The affected package being open source on Maven, so the fix can be read

19 poc-derivable skipped An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit skipped Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match decided it matched Protected by Waratek Description mentions "deserialization" — mitigable by an ARMR deserialization security rule (CWE-532 does not settle the class on its own).

22 exploited-no-fix-or-poc skipped Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold skipped Medium or Low severity, no CISA or VulnCheck KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

24 no-exploit-published skipped Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

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