{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-88647", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-10-08T16:35:41.361Z", "dateReserved": "2026-09-10T00:00:00.000Z", "datePublished": "2026-10-08T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-10-08T16:35:41.361Z"}, "descriptions": [{"lang": "en", "value": "A hostname verification bypass in GnuTLS v3.8.13 allows attackers to circumvent the Common Name fallback mechanism and eavesdrop on communications via a crafted certificate."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://gitlab.com/gnutls/gnutls/-/issues/1802"}, {"url": "https://gist.github.com/lkloliver/f98ec3de1a871fdfc02b70b8b9ba7642"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A hostname verification bypass in GnuTLS v3.8.13 allows attackers to circumvent the Common Name fallback mechanism and eavesdrop on communications via a crafted certificate."}], "id": "CVE-2026-88647", "lastModified": "2026-10-08T21:33:42.423", "metrics": {}, "published": "2026-10-08T17:17:17.783", "references": [{"source": "[email protected]", "url": "https://gist.github.com/lkloliver/f98ec3de1a871fdfc02b70b8b9ba7642"}, {"source": "[email protected]", "url": "https://gitlab.com/gnutls/gnutls/-/issues/1802"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "gnutls: gnutls: Information disclosure via hostname verification bypass", "id": "2548057", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548057"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-295", "details": ["A flaw was found in GnuTLS. This vulnerability can lead to information disclosure by allowing an attacker to bypass certificate hostname verification. A remote attacker presenting a crafted certificate can circumvent the Common Name fallback check, enabling them to eavesdrop on or intercept encrypted network communications."], "name": "CVE-2026-88647", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "gnutls", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-88647\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-88647\nhttps://gist.github.com/lkloliver/f98ec3de1a871fdfc02b70b8b9ba7642\nhttps://gitlab.com/gnutls/gnutls/-/issues/1802"], "threat_severity": "Important"}

{"created": "2026-10-08T19:00:07.495234+00:00", "title": "GnuTLS 3.8.13 Hostname Verification Bypass Enables Eavesdropping", "updated": "2026-10-08T19:00:07.495240+00:00", "vendors": [], "weaknesses": ["CWE-640"]}