Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-56411

CVSS 6.9 · Medium EPSS 0.11% · P2

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
libexpat projectlibexpat< 2.8.2affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-56411

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
Vulnerability Title
libexpat project libexpat 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libexpat project libexpat是libexpat project组织开源的一款C语言编写的流式XML解析器。 libexpat project libexpat 2.8.2之前版本存在数字错误漏洞，该漏洞源于在 endDoctypeDecl 中通过 NOTATION 声明存在整数溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
libexpat projectlibexpat 0 ~ 2.8.2 -

II. Public POCs for CVE-2026-56411

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-56411

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-56411 (1)

Same Patch Batch · libexpat project · 2026-06-21 · 10 CVEs total

CVE-2026-564056.9 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564046.9 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564076.9 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564036.9 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564106.9 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564086.9 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564066.9 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564096.5 MEDIUMlibexpat project libexpat 数字错误漏洞
CVE-2026-564124.9 MEDIUMlibexpat project libexpat 资源管理错误漏洞

IV. Related Vulnerabilities

Same product: libexpat
Same vendor: libexpat project
Same weakness: CWE-190

V. Comments for CVE-2026-56411

No comments yet

Leave a comment