{"schema":"threatline.record/2","record":{"id":"CVE-2026-115700","aliases":[],"summary":"SSRF allowlist bypass via percent-encoded bracketed IPv6 or trailing-dot IP literal in hackney","details":"Interpretation Conflict vulnerability in hackney_url in benoitc hackney allows Server Side Request Forgery via a percent-encoded bracketed IPv6 literal or an IP literal with a trailing dot. A host such as %5B%3A%3Affff%3A127%2E0%2E0%2E1%5D (decoding to [::ffff:127.0.0.1]) or 127.0.0.1. is not an IP address to a caller's allowlist built on uri_string:parse/1 and inet:parse_address/1, while hackney connects to the address it denotes. The same applies to a Location target when redirects are followed.\n\nThe IP-literal gate that hackney_url:normalize/2 applies to a percent-decoded host, added to close the percent-encoded IP bypass of CVE-2026-47076, passes the decoded value to inet_parse:address/1 as is. The connect path in hackney_happy:parse_address/1 drops a surrounding bracket pair, and the resolver ignores a trailing dot, so both forms pass the gate and still reach the literal address. Domain names with a trailing dot and unencoded IPv6 literals are not affected.\n\nThis issue affects hackney: from 4.0.1 before 4.9.0.","categories":["Unclassified"],"product":"hackney","vendor":"benoitc","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115700","source_modified_at":"2026-10-26T13:49:02.744Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"hackney","vendor":"benoitc","versions":[{"lessThan":"4.9.0","status":"affected","version":"4.0.1","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115700","source_modified_at":"2026-10-26T13:49:02.744Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"hackney","vendor":"benoitc","versions":[{"lessThan":"f19561a0b422376348c91537e51377ab7325f4ee","status":"affected","version":"452620a92ec1da2e6b4862a049a2a4f04b42068f","versionType":"git"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115700","source_modified_at":"2026-10-26T13:49:02.744Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"hackney","ecosystem":null},"version":"4.9.0","basis":"first unaffected version stated in the CVE record"}],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T13:49:02.744Z","modified_at":"2026-10-26T13:49:02.744Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115700","fetched_at":"2026-10-26T19:10:57.178988Z","source_modified_at":"2026-10-26T13:49:02.744Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/benoitc/hackney/releases/tag/4.9.0","tags":["vendor-advisory","related"]},{"source":"CVE List","url":"https://cna.erlef.org/cves/CVE-2026-115700.html","tags":["related"]},{"source":"CVE List","url":"https://osv.dev/vulnerability/EEF-CVE-2026-115700","tags":["related"]},{"source":"CVE List","url":"https://github.com/benoitc/hackney/pull/987","tags":["related"]},{"source":"CVE List","url":"https://github.com/benoitc/hackney/commit/452620a92ec1da2e6b4862a049a2a4f04b42068f","tags":["related"]},{"source":"CVE List","url":"https://github.com/benoitc/hackney/commit/f19561a0b422376348c91537e51377ab7325f4ee","tags":["patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-26T13:49:02.744Z","content_hash":"18b6e74a3b28af6824f87a4ac0b6cc2b474109ae7b1c7683e43e0e563152dc51"}}