# libexpat project vulnerabilities & exploitation

> As of 2026-10-05, Threadlinqs tracks 10 libexpat project CVEs, 0 in the CISA Known Exploited Vulnerabilities catalog, linked to 0 tracked threat campaigns.

**Data as of:** 2026-10-05

## Exploitation timeline

Threadlinqs has recorded 10 libexpat project CVEs published between 2026-06-15 and 2026-06-15. The busiest month was 2026-06 (10 new CVEs). None of them is listed in CISA KEV yet.

## Most exploited vulnerabilities

Ranked with CISA KEV listings first, then EPSS exploit probability, then CVSS score. Showing 10 of 10 tracked libexpat project CVEs.

- [CVE-2026-56403](https://intel.threadlinqs.com/cve/CVE-2026-56403) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56404](https://intel.threadlinqs.com/cve/CVE-2026-56404) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56405](https://intel.threadlinqs.com/cve/CVE-2026-56405) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56406](https://intel.threadlinqs.com/cve/CVE-2026-56406) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56407](https://intel.threadlinqs.com/cve/CVE-2026-56407) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56408](https://intel.threadlinqs.com/cve/CVE-2026-56408) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56410](https://intel.threadlinqs.com/cve/CVE-2026-56410) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56411](https://intel.threadlinqs.com/cve/CVE-2026-56411) — MEDIUM 6.9 · 2026-06-21
- [CVE-2026-56409](https://intel.threadlinqs.com/cve/CVE-2026-56409) — MEDIUM 6.5 · 2026-06-21
- [CVE-2026-56412](https://intel.threadlinqs.com/cve/CVE-2026-56412) — MEDIUM 4.9 · 2026-06-21

## Products affected

Threadlinqs normalises CPE and CNA product records across all 10 CVEs; 1 distinct libexpat project product is affected. The most frequently affected:

- libexpat — 10 CVEs

## Threat activity

No tracked threat campaign references libexpat project products or CVEs yet. Vulnerability records are still monitored for exploitation and linked as campaigns are ingested.

## How to prioritise libexpat project patching

This order follows the data Threadlinqs holds for libexpat project, not a generic severity checklist:

- No libexpat project CVE is in CISA KEV yet, so rank by exploit probability instead.

## About this data

Vendor attribution comes from the CNA and CPE product records of each CVE, folded to one vendor name; CVSS, EPSS and KEV status are read from the Threadlinqs CVE catalog; campaign and actor links come from tracked threat records. Counts reflect the data as of 2026-10-05 and refresh daily.

Canonical: https://intel.threadlinqs.com/vendors/libexpat-project
All vendors: https://intel.threadlinqs.com/vendors
Full detection coverage and IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp