{"id":"CVE-2026-102633","title":"libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes","summary":"libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable li…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-190"],"vendor":"libexpat","product":"libexpat","affected":["libexpat >= 2.7.2 <= 2.8.5"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T17:17:06.980","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102633","references":[{"url":"https://github.com/libexpat/libexpat","label":"disclosure@vulncheck.com"},{"url":"https://github.com/libexpat/libexpat/blob/R_2_8_5/expat/lib/xmlparse.c#L1003","label":"disclosure@vulncheck.com"},{"url":"https://github.com/libexpat/libexpat/commit/209801d7fbaf07ab74bae8cb32dd2ab9e5846118","label":"disclosure@vulncheck.com"},{"url":"https://github.com/libexpat/libexpat/pull/1392","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/libexpat-2.7.2-through-2.8.5-integer-overflow-in-expat-realloc","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-29T16:52:16.830454Z"},"ingestedAt":"2026-09-29T16:39:33.279Z","slug":"CVE-2026-102633","body":"## Overview\n\nlibexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap buffer overflow, memory corruption, or denial of service.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}