{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47996", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "REJECTED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-25T14:31:58.552Z", "datePublished": "2026-08-25T15:15:53.158Z", "dateUpdated": "2026-09-08T14:57:43.412Z", "dateRejected": "2026-09-08T14:57:43.412Z"}, "containers": {"cna": {"rejectedReasons": [{"lang": "en", "value": "This CVE ID has been rejected as a duplicate."}], "replacedBy": ["CVE-2019-20388", "CVE-2020-24977", "CVE-2021-3517", "CVE-2021-3518"], "providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-08T14:57:43.412Z"}}}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47996", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "REJECTED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-25T14:31:58.552Z", "datePublished": "2026-08-25T15:15:53.158Z", "dateUpdated": "2026-09-08T14:57:43.412Z", "dateRejected": "2026-09-08T14:57:43.412Z"}, "containers": {"cna": {"rejectedReasons": [{"lang": "en", "value": "This CVE ID has been rejected as a duplicate."}], "replacedBy": ["CVE-2019-20388", "CVE-2020-24977", "CVE-2021-3517", "CVE-2021-3518"], "providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-08T14:57:43.412Z"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Rejected reason: This CVE ID has been rejected as a duplicate."}], "id": "CVE-2021-47996", "lastModified": "2026-09-08T15:17:33.597", "metrics": {}, "published": "2026-08-25T16:16:42.930", "references": [], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Rejected"}

{"bugzilla": {"description": "nokogiri: libxml2: Nokogiri: Memory Corruption via Crafted XML Documents", "id": "2523549", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2523549"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["Nokogiri before 1.11.4 (CRuby implementation only, when the packaged/vendored libxml2 is used) bundles libxml2 2.9.10, which is affected by multiple vulnerabilities addressed in libxml2 2.9.12, including a memory leak in xmlSchemaValidateStream (CVE-2019-20388), a global buffer over-read in xmlEncodeEntitiesInternal (CVE-2020-24977), a heap-based buffer overflow (CVE-2021-3517), and an out-of-bounds read (CVE-2021-3518). Processing crafted XML documents may lead to denial of service, information disclosure, or memory corruption.", "A flaw was found in Nokogiri, specifically within its bundled libxml2 library. A remote attacker could exploit multiple vulnerabilities, including memory leaks, buffer over-reads, heap-based buffer overflows, and out-of-bounds reads, by processing specially crafted XML documents. This could lead to memory corruption, information disclosure, or a denial of service."], "name": "CVE-2021-47996", "package_state": [{"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/backend-rhel8", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/system-rhel8", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/system-rhel9", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/toolbox-rhel9", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/zync-rhel9", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "rubygem-nokogiri", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "tfm-rubygem-amazing_print", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "tfm-rubygem-graphql", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-08-25T15:15:53Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47996\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47996\nhttps://github.com/sparklemotion/nokogiri/commit/0e1a49c8907645d2e155f0d89d4d9895ac5112b5\nhttps://github.com/sparklemotion/nokogiri/commit/1098c30a040e72a4654968547f415be4e4c40fe7\nhttps://github.com/sparklemotion/nokogiri/commit/1358d157d0bd83be1dfe356a69213df9fac0b539\nhttps://github.com/sparklemotion/nokogiri/commit/50f06b3efb638efb0abd95dc62dca05ae67882c2\nhttps://github.com/sparklemotion/nokogiri/commit/7ffcd44d7e6c46704f8af0321d9314cd26e0e18a\nhttps://github.com/sparklemotion/nokogiri/commit/8598060bacada41a0eb09d95c97744ff4e428f8e\nhttps://github.com/sparklemotion/nokogiri/commit/babe75030c7f64a37826bb3342317134568bef61\nhttps://github.com/sparklemotion/nokogiri/commit/bf22713507fe1fc3a2c4b525cf0a88c2dc87a3a2\nhttps://github.com/sparklemotion/nokogiri/security/advisories/GHSA-7rrm-v45f-jp64\nhttps://www.vulncheck.com/advisories/nokogiri-before-multiple-vulnerabilities-via-libxml2"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "nokogiri", "vendor": "nokogiri"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.11.4)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "1.11.4"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "nokogiri", "source": "cna", "vendor": "sparklemotion"}, "product": "nokogiri", "vendor": "sparklemotion"}], "created": "2026-08-25T17:15:05.681956+00:00", "updated": "2026-08-28T19:00:11.207098+00:00", "vendors": ["nokogiri", "nokogiri$PRODUCT$nokogiri", "sparklemotion", "sparklemotion$PRODUCT$nokogiri"]}