{"schemaVersion":3,"id":"CVE-2026-86145","aliases":["ALPINE-CVE-2026-86145","MGASA-2026-0431","UBUNTU-CVE-2026-86145","DEBIAN-CVE-2026-86145"],"status":"published","duplicateOf":null,"title":null,"description":"PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).","dates":{"published":"2026-09-05T05:09:25.571Z","modified":"2026-09-08T18:07:49.889Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.2,"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:N/I:H/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00394,"percentile":0.32335,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.02100000000000001,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00373},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0052,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00394,"percentile":0.32335}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00373,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0052,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00394,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00394,"percentile":0.32335}]},"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-424","name":"Improper Protection of Alternate Path","description":"The product does not sufficiently protect all possible paths that a user can take to access restricted functionality or resources.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/424.html"}],"affected":[{"vendor":"alpine","product":"pcre2","name":"pcre2","label":"pcre2","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/pcre2","purlType":"apk","versions":[{"text":"< 10.43-r1","noFixRecorded":false,"fixedIn":null},{"text":"< 10.46-r1","noFixRecorded":false,"fixedIn":null},{"text":"< 10.48-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.43-r1 | < 10.46-r1 | < 10.48-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"pcre2","name":"pcre2","label":"pcre2","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/pcre2","purlType":"deb","versions":[{"text":"< 10.42-1+deb12u1","noFixRecorded":false,"fixedIn":null},{"text":"< 10.46-1~deb13u2","noFixRecorded":false,"fixedIn":null},{"text":"< 10.48-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.42-1+deb12u1 | < 10.46-1~deb13u2 | < 10.48-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"pcre2","name":"pcre2","label":"pcre2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/pcre2","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"mageia","product":"pcre2","name":"pcre2","label":"pcre2","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/pcre2","purlType":"rpm","versions":[{"text":"< 10.48-1.mga10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.48-1.mga10","eol":null,"hubHref":null},{"vendor":"mageia","product":"pcre2","name":"pcre2","label":"pcre2","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/pcre2","purlType":"rpm","versions":[{"text":"< 10.48-1.mga9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 10.48-1.mga9","eol":null,"hubHref":null},{"vendor":"pcre","product":"pcre2","name":"pcre2","label":"pcre2","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 10.32, < 10.48","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 10.32, < 10.48","eol":null,"hubHref":"/vendor/pcre/pcre2"}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf","label":"github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf","hostname":"github.com","tags":["Advisory","REPORT"]},{"url":"https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48","label":"github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48","hostname":"github.com","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/05/3","label":"www.openwall.com/lists/oss-security/2026/09/05/3","hostname":"www.openwall.com","tags":[]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-86145","label":"security.alpinelinux.org/vuln/CVE-2026-86145","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0431.html","label":"advisories.mageia.org/MGASA-2026-0431.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36263","label":"bugs.mageia.org/show_bug.cgi?id=36263","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/04/7","label":"www.openwall.com/lists/oss-security/2026/09/04/7","hostname":"www.openwall.com","tags":["WEB"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/05/3","label":"www.openwall.com/lists/oss-security/2026/09/05/3","hostname":"www.openwall.com","tags":["WEB"]},{"url":"https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-2p8c-ff85-vh9x","label":"github.com/PCRE2Project/pcre2/security/advisories/GHSA-2p8c-ff85-vh9x","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-q8g2-wprr-34m9","label":"github.com/PCRE2Project/pcre2/security/advisories/GHSA-q8g2-wprr-34m9","hostname":"github.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-86145","label":"ubuntu.com/security/CVE-2026-86145","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86145","label":"www.cve.org/CVERecord?id=CVE-2026-86145","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-86145","label":"security-tracker.debian.org/tracker/CVE-2026-86145","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86145","label":"nvd.nist.gov/vuln/detail/CVE-2026-86145","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0478","OPENSUSE-SU-2026:21938-1","RHSA-2026:67534","RHSA-2026:81522","RHSA-2026:81532","RHSA-2026:81613","RHSA-2026:82845","RHSA-2026:82875","RHSA-2026:82876","RHSA-2026:84799","SUSE-SU-2026:23740-1","SUSE-SU-2026:23840-1","SUSE-SU-2026:23891-1","SUSE-SU-2026:23906-1","SUSE-SU-2026:4201-1","SUSE-SU-2026:4241-1","SUSE-SU-2026:4458-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21938-1","SUSE-SU-2026:23740-1","SUSE-SU-2026:23840-1","SUSE-SU-2026:23891-1","SUSE-SU-2026:23906-1","SUSE-SU-2026:4201-1","SUSE-SU-2026:4241-1","SUSE-SU-2026:4458-1"]},"timeline":[{"kind":"published","date":"2026-09-05T05:09:25.571Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-08T18:07:49.889Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T16:02:56.363Z","stale":false,"partial":false}}