{"schemaVersion":3,"id":"CVE-2026-9648","aliases":["UBUNTU-CVE-2026-9648","DEBIAN-CVE-2026-9648","openSUSE-SU-2026:11077-1","openSUSE-SU-2026:11078-1","openSUSE-SU-2026:11079-1","openSUSE-SU-2026:11080-1","openSUSE-SU-2026:11081-1","openSUSE-SU-2026:11082-1","openSUSE-SU-2026:11083-1","openSUSE-SU-2026:11084-1","openSUSE-SU-2026:11085-1","openSUSE-SU-2026:11087-1"],"status":"published","duplicateOf":null,"title":null,"description":"The crypton-x509-validation Haskell library fails to enforce X.509 NameConstraints, allowing TLS clients to accept certificates whose Subject Alternative Names fall outside the issuing CA’s permitted subtrees. This oversight enables an attacker who compromises a name-constrained sub-CA to impersonate domains beyond its intended scope.","dates":{"published":"2026-06-11T14:30:30.800Z","modified":"2026-06-11T15:39:31.210Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.1,"severity":"critical","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:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":10,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":10,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00319,"percentile":0.23528,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.09599999999999999,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00223},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00319,"percentile":0.23528}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00223,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00319,"percentile":0.23528}]},"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":[],"affected":[{"vendor":"debian","product":"haskell-crypton-x509","name":"haskell-crypton-x509","label":"haskell-crypton-x509","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/haskell-crypton-x509","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"debian","product":"haskell-crypton-x509-validation","name":"haskell-crypton-x509-validation","label":"haskell-crypton-x509-validation","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/haskell-crypton-x509-validation","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"haskell-crypton-x509-validation","name":"haskell-crypton-x509-validation","label":"haskell-crypton-x509-validation","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/haskell-crypton-x509-validation","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"haskell programming language","product":"crypton-certificate","name":"crypton-certificate","label":"crypton-certificate","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.9.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.9.1","eol":null,"hubHref":"/vendor/haskell_programming_language/crypton-certificate"},{"vendor":"opensuse","product":"ghc-aws&distro=openSUSE Tumbleweed","name":"ghc-aws","label":"ghc-aws&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-aws&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 0.25.2-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.25.2-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-asn1-encoding&distro=openSUSE Tumbleweed","name":"ghc-crypton-asn1-encoding","label":"ghc-crypton-asn1-encoding&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-asn1-encoding&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 0.10.0-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.10.0-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-asn1-parse&distro=openSUSE Tumbleweed","name":"ghc-crypton-asn1-parse","label":"ghc-crypton-asn1-parse&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-asn1-parse&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 0.10.0-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.10.0-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-asn1-types&distro=openSUSE Tumbleweed","name":"ghc-crypton-asn1-types","label":"ghc-crypton-asn1-types&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-asn1-types&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 0.4.1-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.4.1-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-pem&distro=openSUSE Tumbleweed","name":"ghc-crypton-pem","label":"ghc-crypton-pem&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-pem&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 0.3.0-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.3.0-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-x509-store&distro=openSUSE Tumbleweed","name":"ghc-crypton-x509-store","label":"ghc-crypton-x509-store&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-x509-store&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 1.9.0-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.9.0-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-x509-system&distro=openSUSE Tumbleweed","name":"ghc-crypton-x509-system","label":"ghc-crypton-x509-system&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-x509-system&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 1.9.0-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.9.0-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-x509-validation&distro=openSUSE Tumbleweed","name":"ghc-crypton-x509-validation","label":"ghc-crypton-x509-validation&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-x509-validation&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 1.9.1-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.9.1-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"ghc-crypton-x509&distro=openSUSE Tumbleweed","name":"ghc-crypton-x509","label":"ghc-crypton-x509&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/ghc-crypton-x509&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 1.9.1-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.9.1-1.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"git-annex&distro=openSUSE Tumbleweed","name":"git-annex","label":"git-annex&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/git-annex&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 10.20260601-2.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.20260601-2.1","eol":null,"hubHref":null}],"affectedCount":14,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/kazu-yamamoto/crypton-certificate/pull/30","label":"github.com/kazu-yamamoto/crypton-certificate/pull/30","hostname":"github.com","tags":["REPORT"]},{"url":"https://github.com/kazu-yamamoto/crypton-certificate/pull/30/changes/f4b77edf6ead77f4a886da40e41eab20f0180e39","label":"github.com/kazu-yamamoto/…","hostname":"github.com","tags":["REPORT"]},{"url":"https://hackage.haskell.org/package/crypton-x509-validation-1.9.1/revisions/","label":"hackage.haskell.org/package/crypton-x509-validation-1.9.1/revisions/","hostname":"hackage.haskell.org","tags":["REPORT"]},{"url":"https://github.com/haskell/security-advisories/pull/332","label":"github.com/haskell/security-advisories/pull/332","hostname":"github.com","tags":["REPORT"]},{"url":"https://www.kb.cert.org/vuls/id/862559","label":"www.kb.cert.org/vuls/id/862559","hostname":"www.kb.cert.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-9648","label":"ubuntu.com/security/CVE-2026-9648","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-9648","label":"www.cve.org/CVERecord?id=CVE-2026-9648","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-9648","label":"security-tracker.debian.org/tracker/CVE-2026-9648","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-9648","label":"www.suse.com/security/cve/CVE-2026-9648","hostname":"www.suse.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-06-11T14:30:30.800Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-11T15:39:31.210Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T23:31:00.196Z","stale":false,"partial":false}}