{"schema":"threatline.record/2","record":{"id":"CVE-2026-101087","aliases":["GHSA-jr2j-7hvh-h4q9"],"summary":"Nezha 2.0.10 through 2.3.2 SSRF Denylist Bypass IPv6","details":"Nezha versions 2.0.10 through 2.3.2 use a restricted HTTP client to validate user-configurable notification and DDNS webhook URLs, but the denylist did not cover IPv6 transition ranges — specifically the 6to4 prefix 2002::/16 and the local-use IPv4/IPv6 translation prefix 64:ff9b:1::/48. Because such addresses satisfy Go's netip.Addr.IsGlobalUnicast check, the URL validator accepted them. An authenticated user able to configure a webhook may be able to cause the dashboard to issue requests to an otherwise restricted IPv6 endpoint, but only where the dashboard's network provides unusual or non-standards-compliant routing for these transition ranges; no direct path to an IPv4 metadata, loopback, or private-network HTTP request has been demonstrated. The issue is fixed in version 2.3.3 (commit d1fcde8e), which blocks both prefixes.","categories":["Unclassified"],"product":"nezha","vendor":"nezhahq","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-101087","source_modified_at":"2026-09-30T14:12:28.088Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"nezha","vendor":"nezhahq","versions":[{"version":"2.0.10","status":"affected","versionType":"semver","lessThan":"2.3.3"},{"version":"2.3.3","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-101087","source_modified_at":"2026-09-30T14:12:28.088Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"nezha","ecosystem":null},"version":"2.3.3","basis":"first unaffected version stated in the CVE record"}],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00261,"percentile":0.16866,"score_date":"2026-10-23"},"published_at":"2026-09-27T20:49:58.749Z","modified_at":"2026-09-30T14:12:28.088Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-101087","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-30T14:12:28.088Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-101087","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-jr2j-7hvh-h4q9","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://github.com/nezhahq/nezha/commit/d1fcde8e","tags":["patch"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/nezha-2.0.10-through-2.3.2-ssrf-denylist-bypass-ipv6","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-30T14:12:20.579702Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-30T14:12:28.088Z","content_hash":"4d37d294d8ee7ffacca9a270f1acc581b288e76219bae76b2e664e608bd6dfe5"}}