Technology · Libexpat Project
Libexpat Project Libexpat vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 30 vulnerabilities in Libexpat Project Libexpat: 0 in the last 7 days and 4 in the last 90 days, 3 of them critical and 0 exploited in the wild. The most recent, CVE-2026-118370, was published on 28 October 2026. 1 vulnerability in the last four weeks, up from none in the four before.
- Last 7 days
- 0
- Last 90 days
- 4
- Critical, all time
- 3
- Exploited in the wild
- 0
About Libexpat Project Libexpat
Open-source XML parser library written in C.
Latest Libexpat Project Libexpat vulnerabilities
- CVE-2026-118370: libexpat signed integer overflow in storeAttsmediumCVSS 5.9
- CVE-2026-76957: libexpat use-after-free in custom encoding callbacksmediumCVSS 4.9EPSS 0.1%
- CVE-2026-76956: libexpat hash flooding denial of service via mishandled entropy generationmediumCVSS 5.9EPSS 0.4%
- CVE-2026-66046: Expat XML parser denial of service via quadratic complexityhighCVSS 7.5EPSS 0.8%
- CVE-2026-56412: libexpat use-after-free in doCdataSectionmediumCVSS 4.9
- CVE-2026-56411: libexpat integer overflow in xmlwf endDoctypeDeclmediumCVSS 6.9
- CVE-2026-56410: libexpat xmlwf integer overflow in resolveSystemIdmediumCVSS 6.9
- CVE-2026-56409: libexpat xmlwf integer overflow in output filename handlingmediumCVSS 6.5
- CVE-2026-56408: libexpat integer overflow in copyStringmediumCVSS 6.9
- CVE-2026-56407: libexpat integer overflow in doProlog entity handlingmediumCVSS 6.9
- CVE-2026-56406: libexpat integer overflow in XML_ParseBuffermediumCVSS 6.9
- CVE-2026-56405: libexpat integer overflow in getAttributeIdmediumCVSS 6.9
- CVE-2026-56404: libexpat integer overflow in addBindingmediumCVSS 6.9
- CVE-2026-56403: libexpat integer overflow in storeAttsmediumCVSS 6.9
- CVE-2026-56132: libexpat heap buffer overflow in doPrologmediumCVSS 6.9
- CVE-2026-56131: libexpat use-after-free in XML_ResumeParsermediumCVSS 4.9
- CVE-2026-50219: libexpat use-after-free via insufficient handler call depth trackingmediumCVSS 4.9
- CVE-2026-7210: Python CPython denial of service in XML parserscriticalCVSS 9.8EPSS 0.1%
- CVE-2026-45186: libexpat denial of service via attribute name collision checklowCVSS 2.9EPSS 0.3%
- CVE-2026-41080: libexpat insufficient entropy for hash salt in XML parsinglowCVSS 2.9EPSS 0.0%
- CVE-2026-32778: libexpat NULL pointer dereference in setContext functionlowCVSS 2.9EPSS 0.1%
- CVE-2026-32777: libexpat infinite loop in entityValueProcessor during DTD parsingmediumCVSS 4EPSS 0.2%
- CVE-2026-32776: libexpat NULL pointer dereference in XML entity parsingmediumCVSS 4EPSS 0.1%
- CVE-2026-25210: libexpat integer overflow in doContent tag buffer reallocationmediumCVSS 6.9EPSS 0.0%
- CVE-2026-24515: libexpat NULL pointer dereference in XML_ExternalEntityParserCreatelowCVSS 2.9EPSS 0.0%
Most severe Libexpat Project Libexpat vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-7210: Python CPython denial of service in XML parserscriticalCVSS 9.8EPSS 0.1%
- CVE-2024-45492: libexpat integer overflow in nextScaffoldPartcriticalCVSS 9.8
- CVE-2024-45491: libexpat integer overflow in dtdCopy functioncriticalCVSS 9.8
- CVE-2026-66046: Expat XML parser denial of service via quadratic complexityhighCVSS 7.5EPSS 0.8%
- CVE-2025-59375: libexpat Expat resource exhaustion in XML parsinghighCVSS 7.5
- CVE-2024-45490: libexpat integer overflow in XML_ParseBufferhighCVSS 7.5
- CVE-2026-25210: libexpat integer overflow in doContent tag buffer reallocationmediumCVSS 6.9EPSS 0.0%
- CVE-2026-56411: libexpat integer overflow in xmlwf endDoctypeDeclmediumCVSS 6.9
- CVE-2026-56410: libexpat xmlwf integer overflow in resolveSystemIdmediumCVSS 6.9
- CVE-2026-56408: libexpat integer overflow in copyStringmediumCVSS 6.9
Vulnerabilities per week
1 vulnerability in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 3 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 1 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Libexpat Project Libexpat vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/libexpat)<a href="https://junglewise.ai/threats/technologies/libexpat"><img src="https://junglewise.ai/threats/technologies/libexpat/badge.svg" alt="Libexpat Project Libexpat vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/libexpat.json, and this page as text at https://junglewise.ai/threats/technologies/libexpat.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Libexpat Project Libexpat vulnerabilities", https://junglewise.ai/threats/technologies/libexpat, 9 November 2026.