{"id":"CVE-2026-115693","revision":null,"records":[{"revision":"e0792a264e0e4fdfb448b73d9269e824","observedAt":"2026-10-26T15:35:30.984+00:00","statement":{"source":"cve-program","id":"CVE-2026-115693","aliases":[],"title":"Custom cacerts or cacertfile do not restrict trust to the pinned CA in hackney","description":"Improper Certificate Validation vulnerability in hackney_ssl in benoitc hackney allows an on-path attacker to impersonate a server pinned to a private certificate authority via a certificate chain that ends in a publicly trusted root. hackney adds {partial_chain, fun hackney_ssl:partial_chain/1} to every verify_peer configuration. The callback returns any certificate in the peer chain whose public key matches a root in the bundled certifi store as the trust anchor, and OTP honours that callback over the configured cacerts. hackney_ssl:merge_ssl_opts/3 kept the callback when the caller replaced the trust store with cacerts or cacertfile in ssl_options, so a connection pinned to a private CA still accepted any chain that carried a publicly trusted root.\n\nThe hostname check still applies, so the attacker needs a publicly trusted certificate for the pinned hostname.\n\nThis issue affects hackney: from 1.24.0 before 4.9.0.","state":0,"publishedAt":"2026-10-26T13:49:29.374+00:00","modifiedAt":"2026-10-26T13:49:29.374+00:00","affected":[{"ecosystem":"https://repo.hex.pm","name":"hackney","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://repo.hex.pm\",\n                    \"cpes\": [\n                        \"cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"hackney_ssl\"\n                    ],\n                    \"packageName\": \"hackney\",\n                    \"packageURL\": \"pkg:hex/hackney\",\n                    \"product\": \"hackney\",\n                    \"programFiles\": [\n                        \"src/hackney_ssl.erl\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"hackney_ssl:ssl_opts/2\"\n                        },\n                        {\n                            \"name\": \"hackney_ssl:merge_ssl_opts/3\"\n                        },\n                        {\n                            \"name\": \"hackney_ssl:partial_chain/1\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/benoitc/hackney\",\n                    \"vendor\": \"benoitc\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"4.9.0\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.24.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"https://github.com","name":"benoitc/hackney","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://github.com\",\n                    \"cpes\": [\n                        \"cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"hackney_ssl\"\n                    ],\n                    \"packageName\": \"benoitc/hackney\",\n                    \"packageURL\": \"pkg:github/benoitc/hackney\",\n                    \"product\": \"hackney\",\n                    \"programFiles\": [\n                        \"src/hackney_ssl.erl\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"hackney_ssl:ssl_opts/2\"\n                        },\n                        {\n                            \"name\": \"hackney_ssl:merge_ssl_opts/3\"\n                        },\n                        {\n                            \"name\": \"hackney_ssl:partial_chain/1\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/benoitc/hackney\",\n                    \"vendor\": \"benoitc\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"915eb5737e9c489d8fc22eec8cdae30e9b027be4\",\n                            \"status\": \"affected\",\n                            \"version\": \"d8a9afcf5c3849904274e2eba1df56c63d1a1a0c\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/benoitc/hackney/pull/978","https://cna.erlef.org/cves/CVE-2026-115693.html","https://osv.dev/vulnerability/EEF-CVE-2026-115693","https://github.com/benoitc/hackney/releases/tag/4.9.0","https://github.com/benoitc/hackney/commit/d8a9afcf5c3849904274e2eba1df56c63d1a1a0c","https://github.com/benoitc/hackney/commit/915eb5737e9c489d8fc22eec8cdae30e9b027be4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115693","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115693","identifiers":["CVE-2026-115693"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-28T10:33:32.5344446+00:00","complete":true,"records":1760,"lastAttemptAt":"2026-10-28T10:33:32.5344446+00:00","lastSuccessAt":"2026-10-28T10:33:32.6834837+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:33:32.6834858+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-d2186f400c54d65f61687f78bb1a00d184d2e215877d0194d7ed70caee809a44-dbe935b5c0445aa8bf0ad6eee2fdccbed1511848550405783cb6764f13f2cea1","complete":true,"records":415637,"lastAttemptAt":"2026-10-28T10:33:28.1218743+00:00","lastSuccessAt":"2026-10-28T10:33:28.0918568+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:33:28.1218743+00:00","snapshotPublishedAt":"2026-10-28T10:28:43+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-617b14506f934037b3a07f3013927a0c","complete":false,"records":13202,"lastAttemptAt":"2026-10-28T10:34:22.8999643+00:00","lastSuccessAt":"2026-10-28T10:34:22.9730007+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:34:22.9730007+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-28T10:33:32.5344446+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-28T10:33:32.5344446+00:00","lastSuccessAt":"2026-10-28T10:33:32.6846081+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:33:32.6846084+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-8d16a738328646698f9217d8ea11893c","complete":true,"records":13449,"lastAttemptAt":"2026-10-28T10:33:33.1463542+00:00","lastSuccessAt":"2026-10-27T22:48:29.491+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:29.491+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13514,"expectedIdentifiers":13514,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-f7cb12508d9e6a348c8a60f772ed85529cc80cd2ff853da1099b57754b20e943","complete":true,"records":9790,"lastAttemptAt":"2026-10-28T10:33:28.4933633+00:00","lastSuccessAt":"2026-10-27T21:49:03.9756799+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:33:28.4933633+00:00","snapshotPublishedAt":"2026-10-27T21:48:11+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-72e5e79de0026dd0562d40734074a2236a06886643d67182b8381eaee757dbf7","complete":true,"records":1966,"lastAttemptAt":"2026-10-28T10:33:28.2877501+00:00","lastSuccessAt":"2026-10-27T21:46:38.0277323+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:33:28.2877501+00:00","snapshotPublishedAt":"2026-10-27T21:18:15+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-9cc0e41ed4e75d0c111bed7fd0bbcd4f139c80cc1fc67f8c3d9a33a41da846ad","complete":true,"records":3002,"lastAttemptAt":"2026-10-28T10:33:32.5040876+00:00","lastSuccessAt":"2026-10-28T10:33:32.3653779+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:33:32.5040876+00:00","snapshotPublishedAt":"2026-10-28T09:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-2ba4ef78ff3a54a3ff2eeaf8e09b7b84901727f582723b80c5b0279e777b2781","complete":true,"records":230857,"lastAttemptAt":"2026-10-28T10:33:28.3916004+00:00","lastSuccessAt":"2026-10-28T09:35:14.9469514+00:00","error":null,"lastVerifiedAt":"2026-10-28T10:33:28.3916004+00:00","snapshotPublishedAt":"2026-10-28T09:33:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}