{"id":"CVE-2026-43897","summary":"Link Preview JS: vunerable to IPv6 and internal loopback attacks","details":"Link Preview JS extracts web links information. Prior to 4.0.1, the library did not check for IPv6 loopback attacks. There was also a DNS attack, where an address could be resolved into an internal IP. This could cause internal data leaks. This vulnerability is fixed in 4.0.1.","aliases":["GHSA-4gp8-rjrq-ch6q"],"modified":"2026-07-15T01:49:18.444793117Z","published":"2026-05-11T21:14:40.495Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43897.json"},"references":[{"type":"WEB","url":"https://github.com/OP-Engineering/link-preview-js/releases/tag/4.0.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43897.json"},{"type":"ADVISORY","url":"https://github.com/OP-Engineering/link-preview-js/security/advisories/GHSA-4gp8-rjrq-ch6q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43897"},{"type":"FIX","url":"https://github.com/OP-Engineering/link-preview-js/commit/4396d48909fab37553c0e93e26447fe218363ede"},{"type":"FIX","url":"https://github.com/OP-Engineering/link-preview-js/pull/179"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/op-engineering/link-preview-js","events":[{"introduced":"0"},{"fixed":"4396d48909fab37553c0e93e26447fe218363ede"},{"fixed":"c163e0f6c300a178c66af96c5c9a179668063fb0"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"4.0.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["4.0.0","3.2.0","3.1.0","3.0.15","3.0.14","3.0.13","3.0.12","3.0.11","3.0.10","3.0.9","3.0.8","3.0.7","3.0.6","3.0.5","3.0.0","2.1.2","2.1.1","v2.0.0","1.6.0","1.5.0","1.4.3","v1.4.0","v1.3.5","1.3.4","v1.3.1","v1.3.0","v1.2.1","V1.2.0","v1.1.2","v1.1.0","v1.0.7","v1.0.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43897.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}