CVE-2026-118370

expat: expat: Denial of Service via integer overflow during XML attribute parsing

expat

libexpat through 2.9.0 contains a signed integer overflow vulnerability in storeAtts() in lib/xmlparse.c that allows attackers to trigger out-of-bounds writes via oversized attribute counts. Attackers can supply a multi-gigabyte document with a start tag carrying over 2^30 attributes to overflow attIndex and nPrefixes, crashing applications or corrupting heap memory.

28. Okt 2026

Ausgewertete Quellen

• Red Hat
  Red Hat
• Hinweis
  https://www.vulncheck.com/advisories/libexpat-through-2.9.0-integer-overflow-in-storeatts-via-attindex-and-nprefixes
• NVD
  CVE-2026-118370