# Libexpat vulnerabilities Source: https://junglewise.ai/threats/vendors/libexpat Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/libexpat.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 8 vulnerabilities in Libexpat: 1 in the last 7 days and 8 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-124317, was published on 7 November 2026. 4 vulnerabilities in the last four weeks, up 100% on the four before (2). 1 technology has a page of its own. ## Counts - Last 7 days: 1 - Last 30 days: 4 - Last 90 days: 8 - All time: 8 (0 critical, 0 exploited in the wild) ## About Libexpat XML parser library for parsing and processing XML documents in C applications. ## Latest Libexpat vulnerabilities - [CVE-2026-124317: libexpat out-of-bounds read in unknown encoding handlers](https://junglewise.ai/threats/cve-2026-124317-libexpat-through-2-10-0-contains-an-out-of-bounds-read) (medium, CVSS 4.8, published 7 Nov 2026) - [CVE-2026-117610: libexpat NULL pointer dereference in external entity parsing](https://junglewise.ai/threats/cve-2026-117610-libexpat-through-2-9-0-contains-a-null-pointer-dereference) (medium, CVSS 5.9, published 28 Oct 2026) - [CVE-2026-115506: libexpat denial of service in billion laughs protection](https://junglewise.ai/threats/cve-2026-115506-libexpat-through-2-9-0-contains-a-denial-of-service) (high, CVSS 7.5, published 22 Oct 2026) - [CVE-2026-113351: libexpat denial of service via XML_ParserReset byte count inconsistency](https://junglewise.ai/threats/cve-2026-113351-libexpat-2-7-2-through-2-9-0-contains-a-denial-of-service) (medium, CVSS 5.9, published 20 Oct 2026) - [CVE-2026-102633: libexpat integer overflow in expat_realloc on 32-bit platforms](https://junglewise.ai/threats/cve-2026-102633-libexpat-versions-2-7-2-through-2-8-5-contain-an-integer) (medium, CVSS 5.9, published 29 Sep 2026) - [CVE-2026-93990: Expat UTF-16 surrogate validation bypass](https://junglewise.ai/threats/cve-2026-93990-expat-through-2-8-4-fails-to-validate-low-surrogates-following) (high, CVSS 7.5, published 19 Sep 2026) - [CVE-2026-76957: libexpat use-after-free in custom encoding callbacks](https://junglewise.ai/threats/cve-2026-76957-libexpat-use-after-free-in-custom-encoding-callbacks) (medium, CVSS 4.9, published 20 Aug 2026) - [CVE-2026-76956: libexpat hash flooding denial of service via mishandled entropy generation](https://junglewise.ai/threats/cve-2026-76956-libexpat-hash-flooding-denial-of-service-via-mishandled-entropy) (medium, CVSS 5.9, published 20 Aug 2026) ## Most severe Libexpat vulnerabilities - [CVE-2026-93990: Expat UTF-16 surrogate validation bypass](https://junglewise.ai/threats/cve-2026-93990-expat-through-2-8-4-fails-to-validate-low-surrogates-following) (high, CVSS 7.5, published 19 Sep 2026) - [CVE-2026-115506: libexpat denial of service in billion laughs protection](https://junglewise.ai/threats/cve-2026-115506-libexpat-through-2-9-0-contains-a-denial-of-service) (high, CVSS 7.5, published 22 Oct 2026) - [CVE-2026-76956: libexpat hash flooding denial of service via mishandled entropy generation](https://junglewise.ai/threats/cve-2026-76956-libexpat-hash-flooding-denial-of-service-via-mishandled-entropy) (medium, CVSS 5.9, published 20 Aug 2026) - [CVE-2026-117610: libexpat NULL pointer dereference in external entity parsing](https://junglewise.ai/threats/cve-2026-117610-libexpat-through-2-9-0-contains-a-null-pointer-dereference) (medium, CVSS 5.9, published 28 Oct 2026) - [CVE-2026-113351: libexpat denial of service via XML_ParserReset byte count inconsistency](https://junglewise.ai/threats/cve-2026-113351-libexpat-2-7-2-through-2-9-0-contains-a-denial-of-service) (medium, CVSS 5.9, published 20 Oct 2026) - [CVE-2026-102633: libexpat integer overflow in expat_realloc on 32-bit platforms](https://junglewise.ai/threats/cve-2026-102633-libexpat-versions-2-7-2-through-2-8-5-contain-an-integer) (medium, CVSS 5.9, published 29 Sep 2026) - [CVE-2026-76957: libexpat use-after-free in custom encoding callbacks](https://junglewise.ai/threats/cve-2026-76957-libexpat-use-after-free-in-custom-encoding-callbacks) (medium, CVSS 4.9, published 20 Aug 2026) - [CVE-2026-124317: libexpat out-of-bounds read in unknown encoding handlers](https://junglewise.ai/threats/cve-2026-124317-libexpat-through-2-10-0-contains-an-out-of-bounds-read) (medium, CVSS 4.8, published 7 Nov 2026) ## Vulnerabilities per week 4 vulnerabilities in the last four weeks, up 100% on the four before (2). | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 2 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 1 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 1 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 2 | 0 | 0 | | 26 Oct 2026 | 1 | 0 | 0 | | 2 Nov 2026 | 1 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Libexpat technologies - [Libexpat](https://junglewise.ai/threats/technologies/libexpat-libexpat): 4 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Libexpat vulnerabilities", https://junglewise.ai/threats/vendors/libexpat, 9 November 2026.