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        "cveId": "CVE-2026-41081",
        "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "state": "PUBLISHED",
        "assignerShortName": "apache",
        "dateReserved": "2026-04-16T17:22:43.617Z",
        "datePublished": "2026-04-27T13:10:45.886Z",
        "dateUpdated": "2026-04-27T14:43:31.605Z"
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            "affected": [
                {
                    "collectionURL": "https://repo.maven.apache.org/maven2/",
                    "defaultStatus": "unaffected",
                    "packageName": "org.apache.storm:storm-client",
                    "product": "Apache Storm Client",
                    "vendor": "Apache Software Foundation",
                    "versions": [
                        {
                            "lessThan": "2.8.7",
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver"
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                }
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                            "value": "<b>Improper Handling of TLS Client Authentication Failure Leading to Anonymous Principal Assignment in Apache Storm</b><br><br><b>Versions Affected:</b> up to 2.8.7<br><br><b>Description: </b>When TLS transport is enabled in Apache Storm without requiring client certificate authentication (the default configuration), the TlsTransportPlugin assigns a fallback principal (CN=ANONYMOUS) if no client certificate is presented or if certificate verification fails. The underlying SSLPeerUnverifiedException is caught and suppressed rather than rejecting the connection.<br><br>This fail-open behavior means an unauthenticated client can establish a TLS connection and receive a valid principal identity. If the configured authorizer (e.g., SimpleACLAuthorizer) does not explicitly deny access to CN=ANONYMOUS, this may result in unauthorized access to Storm services. The condition is logged at debug level only, reducing visibility in production.<br><br><b>Impact:</b> Unauthenticated clients may be assigned a principal identity, potentially bypassing authorization in permissive or misconfigured environments.<br><br><b>Mitigation:</b> Users should upgrade to 2.8.7 in which TLS authentication failures are handled in a fail-closed manner.<br><br><b>Users who cannot upgrade immediately should:</b><br>- Enable mandatory client certificate authentication (nimbus.thrift.tls.client.auth.required: true)<br>- Ensure authorization rules explicitly deny access to CN=ANONYMOUS<br>- Review all ACL configurations for implicit default-allow behavior<br>"
                        }
                    ],
                    "value": "Improper Handling of TLS Client Authentication Failure Leading to Anonymous Principal Assignment in Apache Storm\n\nVersions Affected: up to 2.8.7\n\nDescription: When TLS transport is enabled in Apache Storm without requiring client certificate authentication (the default configuration), the TlsTransportPlugin assigns a fallback principal (CN=ANONYMOUS) if no client certificate is presented or if certificate verification fails. The underlying SSLPeerUnverifiedException is caught and suppressed rather than rejecting the connection.\n\nThis fail-open behavior means an unauthenticated client can establish a TLS connection and receive a valid principal identity. If the configured authorizer (e.g., SimpleACLAuthorizer) does not explicitly deny access to CN=ANONYMOUS, this may result in unauthorized access to Storm services. The condition is logged at debug level only, reducing visibility in production.\n\nImpact: Unauthenticated clients may be assigned a principal identity, potentially bypassing authorization in permissive or misconfigured environments.\n\nMitigation: Users should upgrade to 2.8.7 in which TLS authentication failures are handled in a fail-closed manner.\n\nUsers who cannot upgrade immediately should:\n- Enable mandatory client certificate authentication (nimbus.thrift.tls.client.auth.required: true)\n- Ensure authorization rules explicitly deny access to CN=ANONYMOUS\n- Review all ACL configurations for implicit default-allow behavior"
                }
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                            "text": "moderate"
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                        "type": "Textual description of severity"
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            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "description": "CWE-287 Improper Authentication",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
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            "providerMetadata": {
                "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
                "shortName": "apache",
                "dateUpdated": "2026-04-27T13:10:45.886Z"
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            "references": [
                {
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.apache.org/thread/plxx5l29dvplk5rwzdcq53rdfl6v4gs8"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Apache Storm Client: Anonymous principal assigned on TLS client certificate verification failure",
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            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2026/04/25/3"
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                    "dateUpdated": "2026-04-27T13:36:46.761Z"
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                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 6.5,
                            "attackVector": "NETWORK",
                            "baseSeverity": "MEDIUM",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                            "integrityImpact": "LOW",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "NONE",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "LOW"
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-27T14:42:46.312578Z",
                                "id": "CVE-2026-41081",
                                "options": [
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                                        "Exploitation": "none"
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                "title": "CISA ADP Vulnrichment",
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