{"schemaVersion":3,"id":"CVE-2026-82208","aliases":["ALPINE-CVE-2026-82208","UBUNTU-CVE-2026-82208","DEBIAN-CVE-2026-82208","CGA-2r8r-5xgj-phfc","CGA-x94p-gcgx-vxvm"],"status":"published","duplicateOf":null,"title":null,"description":"With the wolfSSL backend, when CA caching is enabled and an\n`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can\nsilently reinstall the cached store after the callback returns. A certificate\ntrusted by the cached store but rejected by the callback-selected store is\nthen incorrectly accepted.","dates":{"published":"2026-09-06T17:49:16.014Z","modified":"2026-09-15T06:03:14.795Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Wolfi","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00407,"percentile":0.33841,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":-0.018000000000000047,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00425},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00407,"percentile":0.33841}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00425,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00407,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00407,"percentile":0.33841}]},"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":[{"id":"REF_5F780E42BE20A084","name":"Exploit Reference (hackerone.com)","source":"reference","url":"https://hackerone.com/reports/3973090","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-295","name":"Improper Certificate Validation","description":"The product does not validate, or incorrectly validates, a certificate.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/295.html"}],"affected":[{"vendor":"alpine","product":"curl","name":"curl","label":"curl","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/curl","purlType":"apk","versions":[{"text":"≥ 8.9.1, < 8.22.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 8.9.1, < 8.22.0-r0","eol":null,"hubHref":null},{"vendor":"chainguard","product":"curl","name":"curl","label":"curl","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/curl","purlType":"apk","versions":[{"text":"< 8.22.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 8.22.0-r0","eol":null,"hubHref":null},{"vendor":"wolfi","product":"curl","name":"curl","label":"curl","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/curl","purlType":"apk","versions":[{"text":"< 8.22.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 8.22.0-r0","eol":null,"hubHref":null},{"vendor":"curl","product":"curl","name":"curl","label":"curl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 8.9.1, < 8.14.2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 8.15.0, < 8.16.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 8.17.0, < 8.20.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 8.21.0, < 8.22.0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 0f2876b2c33f6784a27b6f7345bd8cd95b46352a, < ed0338befd1d865a8ea1fbaa90013a096dedd07a","noFixRecorded":false,"fixedIn":null},{"text":"8.21.0","noFixRecorded":false,"fixedIn":null},{"text":"8.20.0","noFixRecorded":false,"fixedIn":null},{"text":"8.19.0","noFixRecorded":false,"fixedIn":null},{"text":"8.18.0","noFixRecorded":false,"fixedIn":null},{"text":"8.17.0","noFixRecorded":false,"fixedIn":null},{"text":"8.16.0","noFixRecorded":false,"fixedIn":null},{"text":"8.15.0","noFixRecorded":false,"fixedIn":null},{"text":"8.14.1","noFixRecorded":false,"fixedIn":null},{"text":"8.14.0","noFixRecorded":false,"fixedIn":null},{"text":"8.13.0","noFixRecorded":false,"fixedIn":null},{"text":"8.12.1","noFixRecorded":false,"fixedIn":null},{"text":"8.12.0","noFixRecorded":false,"fixedIn":null},{"text":"8.11.1","noFixRecorded":false,"fixedIn":null},{"text":"8.11.0","noFixRecorded":false,"fixedIn":null},{"text":"8.10.1","noFixRecorded":false,"fixedIn":null},{"text":"8.10.0","noFixRecorded":false,"fixedIn":null},{"text":"8.9.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 8.9.1, < 8.14.2 | ≥ 8.15.0, < 8.16.1 | ≥ 8.17.0, < 8.20.1 | ≥ 8.21.0, < 8.22.0 | ≥ 0f2876b2c33f6784a27b6f7345bd8cd95b46352a, < ed0338befd1d865a8ea1fbaa90013a096dedd07a | 8.21.0 | 8.20.0 | 8.19.0 | 8.18.0 | 8.17.0 | 8.16.0 | 8.15.0 | 8.14.1 | 8.14.0 | 8.13.0 | 8.12.1 | 8.12.0 | 8.11.1 | 8.11.0 | 8.10.1 | 8.10.0 | 8.9.1","eol":null,"hubHref":"/vendor/curl/curl"},{"vendor":"debian","product":"curl","name":"curl","label":"curl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/curl","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 8.22.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 8.22.0-1","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":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"haxx","product":"curl","name":"curl","label":"curl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 8.9.1, < 8.22.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 8.9.1, < 8.22.0","eol":null,"hubHref":"/vendor/haxx/curl"}],"affectedCount":7,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://curl.se/docs/CVE-2026-82208.json","label":"curl.se/docs/CVE-2026-82208.json","hostname":"curl.se","tags":["WEB","Vendor Advisory"]},{"url":"https://curl.se/docs/CVE-2026-82208.html","label":"curl.se/docs/CVE-2026-82208.html","hostname":"curl.se","tags":["REPORT","WEB","Patch","Vendor Advisory"]},{"url":"https://hackerone.com/reports/3973090","label":"hackerone.com/reports/3973090","hostname":"hackerone.com","tags":["WEB","Exploit","Mitigation","Third Party Advisory"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-82208","label":"security.alpinelinux.org/vuln/CVE-2026-82208","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-82208","label":"ubuntu.com/security/CVE-2026-82208","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-82208","label":"www.cve.org/CVERecord?id=CVE-2026-82208","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-82208","label":"security-tracker.debian.org/tracker/CVE-2026-82208","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82208.json","label":"github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82208.json","hostname":"github.com","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82208","label":"nvd.nist.gov/vuln/detail/CVE-2026-82208","hostname":"nvd.nist.gov","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0515"],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-06T17:49:16.014Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-15T06:03:14.795Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":40,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T23:15:38.938Z","stale":false,"partial":false}}