{"id":"CVE-2026-54729","aliases":["EUVD-2026-51574","GHSA-5846-7qm3-r52j"],"status":"published","title":"dssrf: any users using 1.1.1.1 DNS is impacted by SSRF","description":"DSSRF is a Node.js library that provides a wide range of utilities and advanced SSRF defense checks. Prior to 1.0.5, is_url_safe can treat localhost as safe when DNS resolver 1.1.1.1 returns NXDOMAIN because dns.resolve4 yields no address and no dns.lookup fallback occurs, allowing server-side request forgery. This issue is fixed in version 1.0.5.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0048,"percentile":0.41884,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-918"],"published":"2026-07-31T16:58:42Z","modified":"2026-10-28T02:30:44Z","fixes":[{"ecosystem":"npm","package":"dssrf","fixed_in":["1.0.5"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"dssrf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.4"},{"fixed":"1.0.5"}]}]},{"source":"osv","ecosystem":"npm","package":"dssrf","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.0.5"}]}]}],"products":[{"vendor":"hackingrepo","product":"dssrf-js"}],"references":[{"url":"https://github.com/HackingRepo/dssrf-js/security/advisories/GHSA-5846-7qm3-r52j","tags":["x_refsource_CONFIRM","exploit","advisory","web"]},{"url":"https://github.com/HackingRepo/dssrf-js/pull/102","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/HackingRepo/dssrf-js/commit/668c21792cd1252baf779a176aa652e2b4c0067d","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/advisories/GHSA-5846-7qm3-r52j"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54729.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54729","tags":["advisory"]},{"url":"https://github.com/HackingRepo/dssrf-js","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-54729","title":"dssrf: any users using 1.1.1.1 DNS is impacted by SSRF","description":"DSSRF is a Node.js library that provides a wide range of utilities and advanced SSRF defense checks. Prior to 1.0.5, is_url_safe can treat localhost as safe when DNS resolver 1.1.1.1 returns NXDOMAIN because dns.resolve4 yields no address and no dns.lookup fallback occurs, allowing server-side request forgery. This issue is fixed in version 1.0.5.","status":"published","published":"2026-07-31T16:58:56.571Z","modified":"2026-07-31T17:31:00.32Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T13:38:09.774038Z"}],"euvd":[{"id":"EUVD-2026-51574","description":"DSSRF is a Node.js library that provides a wide range of utilities and advanced SSRF defense checks. Prior to 1.0.5, is_url_safe can treat localhost as safe when DNS resolver 1.1.1.1 returns NXDOMAIN because dns.resolve4 yields no address and no dns.lookup fallback occurs, allowing server-side request forgery. This issue is fixed in version 1.0.5.","status":"published","published":"2026-07-31T16:58:56Z","modified":"2026-07-31T17:31:00Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:02:25.522444Z"}],"ghsa":[{"id":"GHSA-5846-7qm3-r52j","title":"dssrf: any users using 1.1.1.1 DNS is impacted by SSRF","description":"## Summary\n\nis_url_safe can treat localhost as safe when DNS resolver 1.1.1.1 returns NXDOMAIN because dns.resolve4 yields no address and no dns.lookup fallback occurs, allowing server-side request forgery.\n\n## POC\n\nExample to simulate 1.1.1.1 in version before 1.5.0 of dssrf:\n\n```js\nimport { is_url_safe } from '../dist/helpers.js';\nimport dns from 'dns';\n\n\ndns.setServers(['1.1.1.1']);\n\nconst TARGET = 'http://localhost/admin';\n\nconsole.log(`Testing: ${TARGET}`);\nconsole.log(`Current DNS Servers: ${dns.getServers()}`);\n\nconst result = await is_url_safe(TARGET);\n\nif (result === true) {\n    console.log('dssrf treated localhost as SAFE because 1.1.1.1 returned NXDOMAIN.');\n} else {\n    console.log('dssrf blocked localhost.');\n}\n```","status":"published","published":"2026-07-31T16:58:42Z","modified":"2026-07-31T16:58:43Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:40:55.903445Z"}],"nvd":[{"id":"CVE-2026-54729","description":"DSSRF is a Node.js library that provides a wide range of utilities and advanced SSRF defense checks. Prior to 1.0.5, is_url_safe can treat localhost as safe when DNS resolver 1.1.1.1 returns NXDOMAIN because dns.resolve4 yields no address and no dns.lookup fallback occurs, allowing server-side request forgery. This issue is fixed in version 1.0.5.","status":"published","published":"2026-07-31T18:17:17.173Z","modified":"2026-10-23T23:10:00.157Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:12:34.290716Z"}],"osv":[{"id":"CVE-2026-54729","title":"dssrf: any users using 1.1.1.1 DNS is impacted by SSRF","description":"DSSRF is a Node.js library that provides a wide range of utilities and advanced SSRF defense checks. Prior to 1.0.5, is_url_safe can treat localhost as safe when DNS resolver 1.1.1.1 returns NXDOMAIN because dns.resolve4 yields no address and no dns.lookup fallback occurs, allowing server-side request forgery. This issue is fixed in version 1.0.5.","status":"published","published":"2026-07-31T16:58:56.571Z","modified":"2026-10-28T02:30:44.026861626Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:45:10.818486Z"},{"id":"GHSA-5846-7qm3-r52j","title":"dssrf: any users using 1.1.1.1 DNS is impacted by SSRF","description":"## Summary\n\nis_url_safe can treat localhost as safe when DNS resolver 1.1.1.1 returns NXDOMAIN because dns.resolve4 yields no address and no dns.lookup fallback occurs, allowing server-side request forgery.\n\n## POC\n\nExample to simulate 1.1.1.1 in version before 1.5.0 of dssrf:\n\n```js\nimport { is_url_safe } from '../dist/helpers.js';\nimport dns from 'dns';\n\n\ndns.setServers(['1.1.1.1']);\n\nconst TARGET = 'http://localhost/admin';\n\nconsole.log(`Testing: ${TARGET}`);\nconsole.log(`Current DNS Servers: ${dns.getServers()}`);\n\nconst result = await is_url_safe(TARGET);\n\nif (result === true) {\n    console.log('dssrf treated localhost as SAFE because 1.1.1.1 returned NXDOMAIN.');\n} else {\n    console.log('dssrf blocked localhost.');\n}\n```","status":"published","published":"2026-07-31T16:58:42Z","modified":"2026-07-31T17:26:45.389705Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:46:38.213481Z"}]}}