{"id":"CVE-2026-86137","aliases":["AZL-99723","DEBIAN-CVE-2026-86137","EUVD-2026-71830","GHSA-cq7w-3xjv-g47g","MGASA-2026-0459","OESA-2026-3884","OESA-2026-3885","OESA-2026-3886","OESA-2026-3887","OESA-2026-4129","RHSA-2026:64463","UBUNTU-CVE-2026-86137"],"status":"published","title":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds...","description":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.","severity":{"version":"3.1","score":2.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00195,"percentile":0.09272,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2026-09-05T04:19:30Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Azure 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Advisory","web","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86137","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-cq7w-3xjv-g47g"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86137.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-86137","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0459.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35932","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/ZWJ6JIPH33FSDSBTGTTXHQQKFJEXIKRU/","tags":["web"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1124","tags":["web"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/04/5","tags":["web"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/05/4","tags":["web"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3884","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17705","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86138","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86140","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3885","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3886","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3887","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4129","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:64463","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86137","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86143","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86141","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86140","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86138","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86144","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86139","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-86142","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-74860","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_64463.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2529697","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74860","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74860","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528985","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86137","tags":["advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528986","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86138","tags":["advisory"]},{"url":"https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528991","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86139","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86139","tags":["advisory"]},{"url":"https://github.com/GNOME/libxml2/commit/8edbbdb09f24d26a2f900141fddc2b9d014f53b0","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528989","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86140","tags":["advisory"]},{"url":"https://github.com/GNOME/libxml2/commit/d1686f91dbda141a752200419d35639fd6b38340","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528988","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86141","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86141","tags":["advisory"]},{"url":"https://github.com/GNOME/libxml2/commit/e89a8aae4c9b40cdafcf66b3f9e57c62db37bb55","tags":["article"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1107","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528990","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86142","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86142","tags":["advisory"]},{"url":"https://github.com/GNOME/libxml2/commit/6b3a736c0edc74ceec3d82f5252499d7911b3a58","tags":["article"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1113","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528987","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86143","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86143","tags":["advisory"]},{"url":"https://github.com/GNOME/libxml2/commit/90f293ba74d28b1d570920382e707586f68ebf35","tags":["article"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1111","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528992","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-86144","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86144","tags":["advisory"]},{"url":"https://github.com/GNOME/libxml2/commit/b63cd517afecb76582dd9488c55e54ceaf50de61","tags":["article"]},{"url":"https://ubuntu.com/security/CVE-2026-86137","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-86137","description":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.","status":"published","published":"2026-09-05T04:19:30.745Z","modified":"2026-09-14T13:50:50.073Z","cvss":[{"version":"3.1","score":2.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T13:49:42.666099Z"}],"euvd":[{"id":"EUVD-2026-71830","description":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.","status":"published","published":"2026-09-05T04:19:30Z","modified":"2026-09-14T13:50:50Z","cvss":[{"version":"3.1","score":2.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T17:28:20.757989Z"}],"ghsa":[{"id":"GHSA-cq7w-3xjv-g47g","title":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an 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xmlregexp.","status":"published","published":"2026-09-05T05:17:11.49Z","modified":"2026-09-15T19:46:11.827Z","cvss":[{"version":"3.1","score":2.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:44.082631Z"}],"osv":[{"id":"CVE-2026-86137","description":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.","status":"published","published":"2026-09-05T04:19:30.745Z","modified":"2026-10-28T11:01:37.617703355Z","cvss":[{"version":"3.1","score":2.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:45:18.825071Z"},{"id":"DEBIAN-CVE-2026-86137","description":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.","status":"published","published":"2026-09-05T05:17:11.49Z","modified":"2026-10-04T15:00:08.358829373Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:46:05.022702Z"},{"id":"OESA-2026-3884","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nInteger overflow in libxml in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)(CVE-2026-17705)\n\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.(CVE-2026-86137)\n\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.(CVE-2026-86138)\n\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.(CVE-2026-86140)","status":"published","published":"2026-09-20T13:22:53Z","modified":"2026-09-20T13:30:22.733006218Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-3885","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. 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(Chromium security severity: High)(CVE-2026-17705)\n\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.(CVE-2026-86137)\n\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.(CVE-2026-86138)\n\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.(CVE-2026-86140)","status":"published","published":"2026-09-20T13:22:54Z","modified":"2026-09-20T13:30:22.742883436Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-3886","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nInteger overflow in libxml in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)(CVE-2026-17705)\n\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.(CVE-2026-86137)\n\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.(CVE-2026-86138)\n\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.(CVE-2026-86140)","status":"published","published":"2026-09-20T13:22:54Z","modified":"2026-09-20T13:30:22.746777481Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-3887","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nInteger overflow in libxml in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)(CVE-2026-17705)\n\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.(CVE-2026-86137)\n\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.(CVE-2026-86138)\n\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.(CVE-2026-86140)","status":"published","published":"2026-09-20T13:22:55Z","modified":"2026-09-20T13:30:22.792668042Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-4129","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nInteger overflow in libxml in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)(CVE-2026-17705)\n\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.(CVE-2026-86137)\n\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.(CVE-2026-86138)\n\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.(CVE-2026-86140)","status":"published","published":"2026-09-25T01:28:48Z","modified":"2026-09-25T01:45:13.753315026Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"RHSA-2026:64463","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-09-09T10:19:53Z","modified":"2026-10-16T10:22:19Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"UBUNTU-CVE-2026-86137","description":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.","status":"withdrawn","published":"2026-09-05T05:17:00Z","modified":"2026-10-09T07:45:03.021459106Z","cvss":[{"version":"3.1","score":2.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"AZL-99723","title":"CVE-2026-86137 affecting package libxml2 for versions less than 2.11.5-11","description":"In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.","status":"published","published":"2026-09-05T05:17:11Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:26.480138Z"},{"id":"MGASA-2026-0459","title":"Updated libxml2 packages fix security vulnerabilities","description":"The updated packages fix several security issues:\nStack-Based Buffer Overflow in libxml2. (CVE-2026-11979)\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds\nread, aka an out-of-bounds read in the NXT macro in xmlregexp.\n(CVE-2026-86137)\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer\noverflow and resultant heap-based buffer overflow. (CVE-2026-86138)\nIn libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer\noverflow. (CVE-2026-86139)\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat\nstack-based buffer overflow. (CVE-2026-86140)\nxmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in\nxmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate\na string length after NULL checking. (CVE-2026-86141)\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in\nxmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.\n(CVE-2026-86142)\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in\nxmlOutputWriteCallback and xmlBufUse causes negative lengths to reach\nwrite callbacks, aka a lack of a check for integer overflow before\ncalling writecallback. This has security relevance for many types of\nuses of that length value within a callback. (CVE-2026-86143)\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and\nxmlXIncludeProcessTree do not propagate parseFlags. This has security\nrelevance for, for example, the XML_PARSE_NONET flag, if (without it) a\ncustom resource loader accesses the internet and triggers XML external\nentity injection, SSRF, or a denial of service (e.g., for an\nattacker-controlled internet resource that is intentionally slow).\n(CVE-2026-86144)\n","status":"published","published":"2026-09-28T17:04:04Z","modified":"2026-09-28T17:15:03.661029458Z","updated_at":"2026-11-02T15:49:43.795591Z"}]}}