{"schemaVersion":3,"id":"CVE-2016-8623","aliases":["ALPINE-CVE-2016-8623","UBUNTU-CVE-2016-8623","DEBIAN-CVE-2016-8623"],"status":"published","duplicateOf":null,"title":null,"description":"A flaw was found in curl before version 7.51.0. The way curl handles cookies permits other threads to trigger a use-after-free leading to information disclosure.","dates":{"published":"2018-08-01T06:00:00.000Z","modified":"2026-04-16T13:46:49.510Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"CVE.org","score":3.3,"severity":"low","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Alpine","score":7.5,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":3.3,"severity":"low","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","exploitability":4.6,"impact":2.3,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Debian","score":7.5,"severity":"high","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true}]},"epss":{"probability":0.02548,"percentile":0.8479,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":-0.20499999999999996,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.02753},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02589,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02548,"percentile":0.8479}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02589,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02753,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02602,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02569,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02548,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02548,"percentile":0.8479}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-416","name":"Use After Free","description":"The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"}],"affected":[{"vendor":"alpine","product":"curl","name":"curl","label":"curl","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/curl","purlType":"apk","versions":[{"text":"< 7.51.0-r0","noFixRecorded":false,"fixedIn":null},{"text":"< 7.51.0","noFixRecorded":false,"fixedIn":null},{"text":"< 7.49.1-r4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 7.51.0-r0 | < 7.51.0 | < 7.49.1-r4","eol":null,"hubHref":null},{"vendor":"debian","product":"curl","name":"curl","label":"curl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/curl","purlType":"deb","versions":[{"text":"< 7.51.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 7.51.0-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"curl","name":"curl","label":"curl","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/curl","purlType":"deb","versions":[{"text":"< 7.35.0-1ubuntu2.10","noFixRecorded":false,"fixedIn":null},{"text":"< 7.47.0-1ubuntu2.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 7.35.0-1ubuntu2.10 | < 7.47.0-1ubuntu2.2","eol":null,"hubHref":null},{"vendor":"haxx","product":"curl","name":"curl","label":"curl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 7.51.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 7.51.0","eol":null,"hubHref":"/vendor/haxx/curl"},{"vendor":"the curl project","product":"curl","name":"curl","label":"curl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"7.51.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"7.51.0","eol":null,"hubHref":"/vendor/the_curl_project/curl"}],"affectedCount":5,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8623","label":"bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8623","hostname":"bugzilla.redhat.com","tags":["X Refsource CONFIRM","Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2018:3558","label":"access.redhat.com/errata/RHSA-2018:3558","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT","Third Party Advisory"]},{"url":"https://curl.haxx.se/docs/adv_20161102I.html","label":"curl.haxx.se/docs/adv_20161102I.html","hostname":"curl.haxx.se","tags":["X Refsource CONFIRM","Patch","Vendor Advisory","REPORT"]},{"url":"http://www.securityfocus.com/bid/94106","label":"www.securityfocus.com/bid/94106","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://www.tenable.com/security/tns-2016-21","label":"www.tenable.com/security/tns-2016-21","hostname":"www.tenable.com","tags":["X Refsource CONFIRM","Third Party Advisory"]},{"url":"http://www.securitytracker.com/id/1037192","label":"www.securitytracker.com/id/1037192","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK","Third Party Advisory"]},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","label":"www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","hostname":"www.oracle.com","tags":["X Refsource CONFIRM","Patch"]},{"url":"https://curl.haxx.se/CVE-2016-8623.patch","label":"curl.haxx.se/CVE-2016-8623.patch","hostname":"curl.haxx.se","tags":["X Refsource CONFIRM","Patch","Vendor Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2018:2486","label":"access.redhat.com/errata/RHSA-2018:2486","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT","Third Party Advisory"]},{"url":"https://security.gentoo.org/glsa/201701-47","label":"security.gentoo.org/glsa/201701-47","hostname":"security.gentoo.org","tags":["Vendor Advisory","X Refsource GENTOO","Third Party Advisory"]},{"url":"https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["Mailing List","X Refsource MLIST"]},{"url":"https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["Mailing List","X Refsource MLIST"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2016-8623","label":"security.alpinelinux.org/vuln/CVE-2016-8623","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-8623","label":"ubuntu.com/security/CVE-2016-8623","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-3123-1","label":"ubuntu.com/security/notices/USN-3123-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-8623","label":"www.cve.org/CVERecord?id=CVE-2016-8623","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-8623","label":"security-tracker.debian.org/tracker/CVE-2016-8623","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["DLA-711-1","DSA-3705-1","MGASA-2018-0053","OPENSUSE-SU-2024:10303-1","RHSA-2018:3558","SUSE-SU-2016:2699-1","SUSE-SU-2016:2700-1","SUSE-SU-2016:2714-1","USN-3123-1"],"duplicates":[],"related":["OPENSUSE-SU-2024:10303-1","SUSE-SU-2016:2699-1","SUSE-SU-2016:2700-1","SUSE-SU-2016:2714-1","USN-3123-1"]},"timeline":[{"kind":"published","date":"2018-08-01T06:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-16T13:46:49.510Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T17:13:53.458Z","stale":false,"partial":false}}