{"id":"CVE-2026-102633","published":"2026-09-29T17:17:06.980","lastModified":"2026-09-29T21:32:59.833","description":"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 libexpat can cause heap buffer overflow, memory corruption, or denial of service.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-190"],"vendors":[],"products":[],"references":[{"url":"https://github.com/libexpat/libexpat","tags":[]},{"url":"https://github.com/libexpat/libexpat/blob/R_2_8_5/expat/lib/xmlparse.c#L1003","tags":[]},{"url":"https://github.com/libexpat/libexpat/commit/209801d7fbaf07ab74bae8cb32dd2ab9e5846118","tags":[]},{"url":"https://github.com/libexpat/libexpat/pull/1392","tags":[]},{"url":"https://www.vulncheck.com/advisories/libexpat-2.7.2-through-2.8.5-integer-overflow-in-expat-realloc","tags":[]}],"exploitRefs":[{"url":"https://github.com/libexpat/libexpat","tags":[]},{"url":"https://github.com/libexpat/libexpat/blob/R_2_8_5/expat/lib/xmlparse.c#L1003","tags":[]},{"url":"https://github.com/libexpat/libexpat/commit/209801d7fbaf07ab74bae8cb32dd2ab9e5846118","tags":[]},{"url":"https://github.com/libexpat/libexpat/pull/1392","tags":[]}],"hasPoc":true,"ai":null}