{"schemaVersion":3,"id":"CVE-2026-0990","aliases":["UBUNTU-CVE-2026-0990","DEBIAN-CVE-2026-0990"],"status":"published","duplicateOf":null,"title":null,"description":"A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker could exploit this configuration-dependent issue by providing a specially crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.","dates":{"published":"2026-01-15T14:20:06.515Z","modified":"2026-09-01T11:54:54.802Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.9,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":5.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":5.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00955,"percentile":0.60749,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.059000000000000025,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00896},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00955,"percentile":0.60749}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00896,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00969,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00955,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00955,"percentile":0.60749}]},"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_BE61A983A4224D70","name":"Exploit Reference (gitlab.gnome.org)","source":"reference","url":"https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-674","name":"Uncontrolled Recursion","description":"The product does not properly control the amount of recursion that takes place,  consuming excessive resources, such as allocated memory or the program stack.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/674.html"}],"affected":[{"vendor":"debian","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libxml2","purlType":"deb","versions":[{"text":"< 2.9.14+dfsg-1.3~deb12u6","noFixRecorded":false,"fixedIn":null},{"text":"< 2.12.7+dfsg+really2.9.14-2.1+deb13u3","noFixRecorded":false,"fixedIn":null},{"text":"< 2.15.2+dfsg-0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.9.14+dfsg-1.3~deb12u6 | < 2.12.7+dfsg+really2.9.14-2.1+deb13u3 | < 2.15.2+dfsg-0.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libxml2","purlType":"deb","versions":[{"text":"< 2.9.1+dfsg1-3ubuntu4.13+esm11","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.3+dfsg1-1ubuntu0.7+esm12","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.4+dfsg1-6.1ubuntu1.9+esm7","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.10+dfsg-5ubuntu0.20.04.10+esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.13+dfsg-1ubuntu0.11","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.14+dfsg-1.3ubuntu3.7","noFixRecorded":false,"fixedIn":null},{"text":"< 2.14.5+dfsg-0.2ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.9.1+dfsg1-3ubuntu4.13+esm11 | < 2.9.3+dfsg1-1ubuntu0.7+esm12 | < 2.9.4+dfsg1-6.1ubuntu1.9+esm7 | < 2.9.10+dfsg-5ubuntu0.20.04.10+esm4 | < 2.9.13+dfsg-1ubuntu0.11 | < 2.9.14+dfsg-1.3ubuntu3.7 | < 2.14.5+dfsg-0.2ubuntu0.1","eol":null,"hubHref":null},{"vendor":"ibm","product":"aix","name":"aix","label":"aix","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 7.2.5, < 7.2.5.12","noFixRecorded":false,"fixedIn":null},{"text":"≥ 7.3.2, < 7.3.3.3","noFixRecorded":false,"fixedIn":null},{"text":"7.3.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 7.2.5, < 7.2.5.12 | ≥ 7.3.2, < 7.3.3.3 | 7.3.4","eol":{"isEol":false,"eolDate":"2028-12-31T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"7.3.4","label":"7.3 TL4","eolFrom":"2028-12-31T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"7.3.4"},"product":{"name":"ibm-aix","label":"IBM AIX","category":"os"}},"hubHref":"/vendor/ibm/aix"},{"vendor":"ibm","product":"vios","name":"vios","label":"vios","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.1.0, < 4.1.1.30","noFixRecorded":false,"fixedIn":null},{"text":"4.1.2.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.1.0, < 4.1.1.30 | 4.1.2.0","eol":null,"hubHref":"/vendor/ibm/vios"},{"vendor":"redhat","product":"enterprise_linux","name":"enterprise linux","label":"enterprise_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"6.0","noFixRecorded":false,"fixedIn":null},{"text":"7.0","noFixRecorded":false,"fixedIn":null},{"text":"8.0","noFixRecorded":false,"fixedIn":null},{"text":"9.0","noFixRecorded":false,"fixedIn":null},{"text":"10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"6.0 | 7.0 | 8.0 | 9.0 | 10.0","eol":{"isEol":true,"eolDate":"2020-11-30T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"6","label":"6 (ELS)","eolFrom":"2020-11-30T00:00:00.000Z","isLts":true,"isMaintained":false,"latestVersion":"6.10"},"product":{"name":"rhel","label":"Red Hat Enterprise Linux","category":"os"}},"hubHref":"/vendor/redhat/enterprise_linux"},{"vendor":"redhat","product":"hardened_images","name":"hardened images","label":"hardened_images","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/redhat/hardened_images"},{"vendor":"redhat","product":"jboss_core_services","name":"jboss core services","label":"jboss_core_services","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/redhat/jboss_core_services"},{"vendor":"redhat","product":"openshift_container_platform","name":"openshift container platform","label":"openshift_container_platform","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"4.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"4.0","eol":null,"hubHref":"/vendor/redhat/openshift_container_platform"},{"vendor":"xmlsoft","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.15.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.15.2","eol":null,"hubHref":"/vendor/xmlsoft/libxml2"}],"affectedCount":9,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:7519","label":"access.redhat.com/errata/RHSA-2026:7519","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT","Third Party Advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-0990","label":"access.redhat.com/security/cve/CVE-2026-0990","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT","REPORT","Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2429959","label":"bugzilla.redhat.com/show_bug.cgi?id=2429959","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT","Third Party Advisory"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018","label":"gitlab.gnome.org/GNOME/libxml2/-/issues/1018","hostname":"gitlab.gnome.org","tags":["Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-0990","label":"ubuntu.com/security/CVE-2026-0990","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-0990","label":"www.cve.org/CVERecord?id=CVE-2026-0990","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-7974-1","label":"ubuntu.com/security/notices/USN-7974-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-0990","label":"security-tracker.debian.org/tracker/CVE-2026-0990","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0990","label":"nvd.nist.gov/vuln/detail/CVE-2026-0990","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0027","OPENSUSE-SU-2026:10213-1","OPENSUSE-SU-2026:20312-1","RHSA-2026:7519","SUSE-SU-2026:0568-1","SUSE-SU-2026:0570-1","SUSE-SU-2026:0605-1","SUSE-SU-2026:0606-1","SUSE-SU-2026:0782-1","SUSE-SU-2026:20631-1","SUSE-SU-2026:20647-1","SUSE-SU-2026:20657-1","SUSE-SU-2026:20707-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:10213-1","OPENSUSE-SU-2026:20312-1","SUSE-SU-2026:0568-1","SUSE-SU-2026:0570-1","SUSE-SU-2026:0605-1","SUSE-SU-2026:0606-1","SUSE-SU-2026:0782-1","SUSE-SU-2026:20631-1","SUSE-SU-2026:20647-1","SUSE-SU-2026:20657-1","SUSE-SU-2026:20707-1","USN-7974-1"]},"timeline":[{"kind":"published","date":"2026-01-15T14:20:06.515Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-01T11:54:54.802Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":34,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T02:26:02.151Z","stale":false,"partial":false}}