{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-34992",
        "tracking": {
            "current_release_date": "2026-04-03T04:40:00.912979Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-34992",
            "initial_release_date": "2026-04-03T04:39:41.574015Z",
            "revision_history": [
                {
                    "date": "2026-04-03T04:39:41.574015Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (6).| CWES updated (1)."
                },
                {
                    "date": "2026-04-03T04:39:46.480282Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                }
            ],
            "status": "interim",
            "version": "2"
        }
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-34992",
            "notes": [
                {
                    "category": "description",
                    "text": "### Impact\nThis is a missing encryption vulnerability (CWE-311) affecting inter-Node Pod traffic. In Antrea clusters configured for dual-stack networking with IPsec encryption enabled (`trafficEncryptionMode: ipsec`), Antrea fails to apply encryption for IPv6 Pod traffic.\n\nWhile the IPv4 traffic is correctly encrypted via ESP (Encapsulating Security Payload), traffic using IPv6 is transmitted in plaintext. This occurs because the packets are encapsulated (using Geneve or VXLAN) but bypass the IPsec encryption layer.\n\nImpacted Users: users with dual-stack clusters and IPsec encryption enabled.\n\nSingle-stack IPv4 or IPv6 clusters are not affected.\n\n### Patches\nYes, the issue has been patched: https://github.com/antrea-io/antrea/pull/7759\nUsers should upgrade to one of the following versions:\n* Antrea v2.6.0 or later\n* Antrea v2.5.2\n* Antrea v2.4.5\n\nAntrea recommends running the `antctl check installation --run ipsec` tool after upgrading to verify that both address families are correctly producing ESP traffic.\n\n### Workarounds\nThere is no configuration workaround to enable IPsec IPv6 in affected versions. If an immediate upgrade is not possible, user may consider using WireGuard instead for inter-Node Pod traffic encryption. The WireGuard support in Antrea does *not* suffer from the same issue.\n\n### Resources\nPull Request with Fix: [antrea-io/antrea#7759](https://github.com/antrea-io/antrea/pull/7759)\nValidation Tool PR: [antrea-io/antrea#7757](https://github.com/antrea-io/antrea/pull/7757)\nAntrea Documentation: [Traffic Encryption Guide](https://github.com/antrea-io/antrea/blob/main/docs/traffic-encryption.md)",
                    "title": "github - https://api.github.com/advisories/GHSA-qcmw-8mm4-4p28"
                },
                {
                    "category": "other",
                    "text": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
                    "title": "CVSSV4"
                },
                {
                    "category": "other",
                    "text": "7.1",
                    "title": "CVSSV4 base score"
                },
                {
                    "category": "other",
                    "text": "4.1",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "The value of the most recent CVSS (V4) score",
                    "title": "NCSC Score top increasing factors"
                }
            ],
            "references": [
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://api.github.com/advisories/GHSA-qcmw-8mm4-4p28"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/antrea-io/antrea/security/advisories/GHSA-qcmw-8mm4-4p28"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/antrea-io/antrea/pull/7757"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/antrea-io/antrea/pull/7759"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/antrea-io/antrea/commit/738bad662b20a5d358d19466936176ef580a9b07"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/antrea-io/antrea/blob/main/docs/traffic-encryption.md"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/advisories/GHSA-qcmw-8mm4-4p28"
                }
            ],
            "title": "CVE-2026-34992"
        }
    ]
}