CVE-2026-90820

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Source

https://cve.org/CVERecord?id=CVE-2026-90820

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90820.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-90820

Published

2026-09-14T20:45:11Z

Modified

2026-09-17T08:06:07Z

Severity

5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X CVSS Calculator

Summary

a2aproject a2a-java AuthorizationRequestHandlerDecorator.java AuthorizationRequestHandlerDecorator.onListTasks authorization

Details

A security vulnerability has been detected in a2aproject a2a-java 1.2.0. The impacted element is the function AuthorizationRequestHandlerDecorator.onListTasks of the file server-common/src/main/java/org/a2aproject/sdk/server/requesthandlers/AuthorizationRequestHandlerDecorator.java. Such manipulation leads to missing authorization. The attack can be launched remotely. Upgrading to version 1.3.0 is sufficient to resolve this issue. The name of the patch is e9a1abf9c90c02b16d17293afdc3cc2f555d63a6. The affected component should be upgraded.

Database specific

{
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-862",
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90820.json"
}

References

Affected packages

Git / github.com/a2aproject/a2a-java

Affected ranges

Type

GIT

Repo

https://github.com/a2aproject/a2a-java

Events

Introduced

0b5c1f8d39cbd5171546e6ae6256b2834ab49671

Fixed

e9a1abf9c90c02b16d17293afdc3cc2f555d63a6

Fixed

43bde91e3319f0a92db3ac2104215dcdbbb77679

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "1.2.0"
        },
        {
            "last_affected": "1.2.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*

1.2.0

v1.*

v1.2.0.Final

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90820.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "100293094495959895489122510652820472508",
                "34464541591767392884855500759467455412",
                "308172812689027456980535683553208878660"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-90820-746b9d66",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/a2aproject/a2a-java/commit/e9a1abf9c90c02b16d17293afdc3cc2f555d63a6",
        "target": {
            "file": "server-common/src/test/java/org/a2aproject/sdk/server/requesthandlers/AuthorizationRequestHandlerDecoratorTest.java"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
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                "217243911474088897295669316019695608172",
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                "120015797837099677813349432230463242501"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-90820-82498fa0",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/a2aproject/a2a-java/commit/e9a1abf9c90c02b16d17293afdc3cc2f555d63a6",
        "target": {
            "file": "server-common/src/main/java/org/a2aproject/sdk/server/requesthandlers/AuthorizationRequestHandlerDecorator.java"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "183777481125528527696626606119822703040",
            "length": 111
        },
        "id": "CVE-2026-90820-89d403ae",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/a2aproject/a2a-java/commit/e9a1abf9c90c02b16d17293afdc3cc2f555d63a6",
        "target": {
            "file": "server-common/src/main/java/org/a2aproject/sdk/server/requesthandlers/AuthorizationRequestHandlerDecorator.java",
            "function": "onListTasks"
        }
    }
]

vanir_signatures_modified

"2026-09-17T08:06:07Z"