{"cve":{"cve_id":"CVE-2025-9086","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.01395,"epss_percentile":0.71878,"epss_as_of":"2026-10-15","description":"1. A cookie is set using the `secure` keyword for `https://target`\n2. curl is redirected to or otherwise made to speak with `http://target` (same\n   hostname, but using clear text HTTP) using the same cookie set\n3. The same cookie name is set - but with only a slash as path (`path=\"/\"`).\n   Since this site is not secure, the cookie *should* be ignored.\n4. A bug in the path comparison logic makes curl read outside a heap buffer\n   boundary\n\nThe bug either causes a crash or it potentially makes the comparison come to\nthe wrong conclusion and lets the clear-text site override the contents of the\nsecure cookie, contrary to expectations and depending on the memory contents\nimmediately following the single-byte allocation that holds the path.\n\nThe presumed and correct behavior would be to plainly ignore the second set of\nthe cookie since it was already set as secure on a secure host so overriding\nit on an insecure host should not be okay.","published_at":"2025-09-12T05:10:03.815000Z","last_modified_at":"2026-10-19T17:10:00.173000Z","cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-125"],"nvd_references":["https://curl.se/docs/CVE-2025-9086.json","https://curl.se/docs/CVE-2025-9086.html","https://hackerone.com/reports/3294999"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-10-21T17:23:05.676697Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"curl","vendor_name":"curl","product_slug":"curl","product_name":"curl","version_start":"8.15.0","version_start_inclusive":true,"version_end":"8.15.0","version_end_inclusive":true,"cpe23_uri":"cve5:curl:curl:8.15.0:8.15.0"},{"vendor_slug":"curl","vendor_name":"curl","product_slug":"curl","product_name":"curl","version_start":"8.14.1","version_start_inclusive":true,"version_end":"8.14.1","version_end_inclusive":true,"cpe23_uri":"cve5:curl:curl:8.14.1:8.14.1"},{"vendor_slug":"curl","vendor_name":"curl","product_slug":"curl","product_name":"curl","version_start":"8.14.0","version_start_inclusive":true,"version_end":"8.14.0","version_end_inclusive":true,"cpe23_uri":"cve5:curl:curl:8.14.0:8.14.0"},{"vendor_slug":"curl","vendor_name":"curl","product_slug":"curl","product_name":"curl","version_start":"8.13.0","version_start_inclusive":true,"version_end":"8.13.0","version_end_inclusive":true,"cpe23_uri":"cve5:curl:curl:8.13.0:8.13.0"},{"vendor_slug":"curl","vendor_name":"curl","product_slug":"curl","product_name":"curl","version_start":"8.13.0","version_start_inclusive":true,"version_end":"8.14.2","version_end_inclusive":false,"cpe23_uri":"cve5:curl:curl:8.13.0:8.14.2"},{"vendor_slug":"curl","vendor_name":"curl","product_slug":"curl","product_name":"curl","version_start":"8.15.0","version_start_inclusive":true,"version_end":"8.16.0","version_end_inclusive":false,"cpe23_uri":"cve5:curl:curl:8.15.0:8.16.0"},{"vendor_slug":"curl","vendor_name":"curl","product_slug":"curl","product_name":"curl","version_start":"1aea05a6c2699e80c75936d58569851555acd603","version_start_inclusive":true,"version_end":"c6ae07c6a541e0e96d0040afb62b45dd37711300","version_end_inclusive":false,"cpe23_uri":"cve5:curl:curl:1aea05a6c2699e80c75936d58569851555acd603:c6ae07c6a541e0e96d0040afb62b45dd37711300"},{"vendor_slug":"debian","vendor_name":"Debian","product_slug":"debian-linux","product_name":"debian_linux","version_start":"11.0","version_start_inclusive":true,"version_end":"11.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"},{"vendor_slug":"haxx","vendor_name":"haxx","product_slug":"curl","product_name":"curl","version_start":"8.13.0","version_start_inclusive":true,"version_end":"8.16.0","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://curl.se/docs/CVE-2025-9086.json","source_type":"MISC","tags":[]},{"url":"https://curl.se/docs/CVE-2025-9086.html","source_type":"MISC","tags":[]},{"url":"https://hackerone.com/reports/3294999","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2025-09-12T05:10:03.815000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:50:10.067033Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:50:10.067033Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:50:10.067033Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"}]}