{
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "OpenSSL",
                    "vendor": "OpenSSL",
                    "versions": [
                        {
                            "lessThan": "4.0.1",
                            "status": "affected",
                            "version": "4.0.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "3.6.3",
                            "status": "affected",
                            "version": "3.6.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "3.5.7",
                            "status": "affected",
                            "version": "3.5.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "3.4.6",
                            "status": "affected",
                            "version": "3.4.0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Abhinav Agarwal"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Alexandr Nedvedicky"
                }
            ],
            "datePublic": "2026-06-09T14:00:00.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "Issue summary: Remote peer may exhaust heap memory of the QUIC<br>server or client by flooding it with packets containing PATH_CHALLENGE<br>frames.<br><br>Impact summary: A malicious remote peer can cause an unbounded<br>memory allocation which can lead to an abnormal termination of the<br>application acting as a QUIC client or server and a Denial of Service.<br><br>A remote peer may exhaust heap memory by flooding the local<br>QUIC stack with PATH_CHALLENGE frames. The local QUIC stack<br>allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.<br>The allocated PATH_RESPONSE frame gets freed only when the remote<br>peer acknowledges reception of the PATH_RESPONSE frame which will<br>not be done by a malicious peer.<br><br>The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by<br>this issue. The QUIC stack is outside of OpenSSL FIPS module<br>boundary."
                        }
                    ],
                    "value": "Issue summary: Remote peer may exhaust heap memory of the QUIC\nserver or client by flooding it with packets containing PATH_CHALLENGE\nframes.\n\nImpact summary: A malicious remote peer can cause an unbounded\nmemory allocation which can lead to an abnormal termination of the\napplication acting as a QUIC client or server and a Denial of Service.\n\nA remote peer may exhaust heap memory by flooding the local\nQUIC stack with PATH_CHALLENGE frames. The local QUIC stack\nallocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.\nThe allocated PATH_RESPONSE frame gets freed only when the remote\npeer acknowledges reception of the PATH_RESPONSE frame which will\nnot be done by a malicious peer.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by\nthis issue. The QUIC stack is outside of OpenSSL FIPS module\nboundary."
                }
            ],
            "metrics": [
                {
                    "format": "other",
                    "other": {
                        "content": {
                            "text": "Moderate"
                        },
                        "type": "https://openssl-library.org/policies/general/security-policy/"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1325",
                            "description": "CWE-1325 Improperly Controlled Sequential Memory Allocation",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "00000000-0000-4000-9000-000000000000",
                "shortName": "openssl"
            },
            "references": [
                {
                    "name": "OpenSSL Advisory",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://openssl-library.org/news/secadv/20260609.txt"
                },
                {
                    "name": "4.0.1 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb"
                },
                {
                    "name": "3.6.3 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517"
                },
                {
                    "name": "3.5.7 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac"
                },
                {
                    "name": "3.4.6 git commit",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler",
            "x_generator": {
                "engine": "Vulnogram 0.2.0"
            }
        }
    },
    "cveMetadata": {
        "assignerOrgId": "00000000-0000-4000-9000-000000000000",
        "cveId": "CVE-2026-34183",
        "requesterUserId": "00000000-0000-4000-9000-000000000000",
        "serial": 1,
        "state": "PUBLISHED"
    },
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1"
}