{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74758",
        "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "state": "PUBLISHED",
        "assignerShortName": "apache",
        "dateReserved": "2026-08-15T08:40:10.439Z",
        "datePublished": "2026-10-21T11:48:23.883Z",
        "dateUpdated": "2026-10-21T11:48:23.883Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
                "shortName": "apache",
                "dateUpdated": "2026-10-21T11:48:23.883Z"
            },
            "title": "Apache bRPC: Heap Use-After-Free in RTMP Abort Message Handling",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "description": "CWE-416 Use After Free",
                            "lang": "en",
                            "cweId": "CWE-416",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "affected": [
                {
                    "vendor": "Apache Software Foundation",
                    "product": "Apache bRPC",
                    "packageURL": "pkg:github/apache/brpc",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "1.18.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "collectionURL": "https://github.com",
                    "packageName": "apache/brpc"
                }
            ],
            "descriptions": [
                {
                    "value": "A heap use-after-free in the RTMP protocol component of Apache bRPC (versions < 1.18.0) allows a remote attacker to crash a bRPC RTMP server by sending a crafted Abort control message. No authentication or application-level request is required.\n\nRoot Cause:\nWhen an RTMP Abort control message names the chunk stream that is currently being parsed (the chunk stream carrying the message itself), RtmpChunkStream::OnAbortMessage calls RtmpContext::ClearChunkStream, which deletes the RtmpChunkStream while its Feed() is still running. After the message handler returns, Feed() continues to access members of the deleted object, resulting in a heap-use-after-free.\n\nAffected Scenarios:\nbRPC servers that enable RTMP support (ServerOptions.rtmp_service set) and accept connections from untrusted networks.\n\nHow to Fix:\n1. Upgrade bRPC to version 1.18.0, which fixes this issue.\n2. Apply this patch:  https://github.com/apache/brpc/pull/3452 \n\nThe fix skips clearing the chunk stream when the Abort message targets the chunk stream that is currently being parsed.",
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "A heap use-after-free in the RTMP protocol component of Apache bRPC (versions &lt; 1.18.0) allows a remote attacker to crash a bRPC RTMP server by sending a crafted Abort control message. No authentication or application-level request is required.<br><br>Root Cause:<br>When an RTMP Abort control message names the chunk stream that is currently being parsed (the chunk stream carrying the message itself), RtmpChunkStream::OnAbortMessage calls RtmpContext::ClearChunkStream, which deletes the RtmpChunkStream while its Feed() is still running. After the message handler returns, Feed() continues to access members of the deleted object, resulting in a heap-use-after-free.<br><br>Affected Scenarios:<br>bRPC servers that enable RTMP support (ServerOptions.rtmp_service set) and accept connections from untrusted networks.<br><br>How to Fix:<br>1. Upgrade bRPC to version 1.18.0, which fixes this issue.<br>2. Apply this patch:&nbsp;<a target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/apache/brpc/pull/3452\">https://github.com/apache/brpc/pull/3452</a><br><br>The fix skips clearing the chunk stream when the Abort message targets the chunk stream that is currently being parsed."
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
            "metrics": [
                {
                    "other": {
                        "type": "Textual description of severity",
                        "content": {
                            "text": "high"
                        }
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Feng Zhijie (Dopamine)",
                    "type": "finder"
                }
            ],
            "x_generator": {
                "engine": "Vulnogram 0.2.0"
            }
        }
    }
}