CVE-2026-54729
highpriority · track · 0EPSS 0.005 · 41 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-5846-7qm3-r52jdssrf: any users using 1.1.1.1 DNS is impacted by SSRF2026-07-31ghsa · osvUS
## Summary 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. ## POC Example to simulate 1.1.1.1 in version before 1.5.0 of dssrf: ```js import { is_url_safe } from '../dist/helpers.js'; import dns from 'dns'; dns.setServers(['1.1.1.1']); const TARGET = 'http://localhost/admin'; console.log(`Testing: ${TARGET}`); console.log(`Current DNS Servers: ${dns.getServers()}`); const result = await is_url_safe(TARGET); if (result === true) { console.log('dssrf treated localhost as SAFE because 1.1.1.1 returned NXDOMAIN.'); } else { console.log('dssrf blocked localhost.'); } ```
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://github.com/HackingRepo/dssrf-js/commit/668c21792cd1252baf779a176aa652e2b4c0067dcnnvd
- https://github.com/HackingRepo/dssrf-js/pull/102cnnvd
- https://github.com/HackingRepo/dssrf-js/security/advisories/GHSA-5846-7qm3-r52jcnnvd
- https://github.com/HackingRepo/dssrf-js/commit/668c21792cd1252baf779a176aa652e2b4c0067denisa_euvd
- https://github.com/HackingRepo/dssrf-js/pull/102enisa_euvd
- https://github.com/HackingRepo/dssrf-js/security/advisories/GHSA-5846-7qm3-r52jenisa_euvd
- https://github.com/HackingRepo/dssrf-js/commit/668c21792cd1252baf779a176aa652e2b4c0067dnvd
- https://github.com/HackingRepo/dssrf-js/pull/102nvd
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