{"id":"CVE-2026-8177","title":"XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.\n\nA node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read…","summary":"XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.\n\nA node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 10)","affected":["enterprise_linux 6","enterprise_linux 7","enterprise_linux_appstream_eus_v_10_0","enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_appstream_e4s_v_9_2","enterprise_linux_appstream_v_9"],"patched":["enterprise_linux_appstream_eus_v_10_0","enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_appstream_e4s_v_9_2","enterprise_linux_appstream_v_9"],"published":"2026-05-10","updated":"2026-09-18","sourceUpdated":"2026-09-18T13:18:37.633","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-8177","references":[{"url":"https://github.com/cpan-authors/XML-LibXML/commit/15652bd905a6c9dda59a81b14d4766adbbae2ea8.patch","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/cpan-authors/XML-LibXML/issues/146","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/cpan-authors/XML-LibXML/pull/149","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/10/8","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/11/2","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2026:39547","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:39553","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:39878","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:68632","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:68685","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:68688","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:68693","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-8177","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2468684","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8177.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-8177"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8177"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00654,"epssPercentile":0.49889,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-05-11T16:34:46.706997Z"},"ingestedAt":"2026-07-16T02:48:54.904Z","slug":"CVE-2026-8177","body":"## Overview\n\nXML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.\n\nA node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory.\n\nAny Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:68632** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68632)\n- **RHSA-2026:39547** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-07-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:39547)\n- **RHSA-2026:39878** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-07-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:39878)\n- **RHSA-2026:68688** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68688)\n- **RHSA-2026:39553** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-07-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:39553)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8177.json)\n- **RHSA-2026:68685** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68685)\n- **RHSA-2026:68693** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68693)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}