CVE-2026-24515
Quick assessment
Affected
libexpat project libexpat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
libexpat是libexpat团队的一款使用C语言编写的流式XML解析器。 libexpat 2.7.4之前版本存在代码问题漏洞，该漏洞源于XML_ExternalEntityParserCreate函数未复制未知编码处理程序的用户数据。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| libexpat project | libexpat | < 2.7.4 |
affected |
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I. Basic Information for CVE-2026-24515
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
libexpat 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libexpat是libexpat团队的一款使用C语言编写的流式XML解析器。 libexpat 2.7.4之前版本存在代码问题漏洞，该漏洞源于XML_ExternalEntityParserCreate函数未复制未知编码处理程序的用户数据。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| libexpat project | libexpat | 0 ~ 2.7.4 | - |
|
II. Public POCs for CVE-2026-24515
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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Same weakness: CWE-476
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V. Comments for CVE-2026-24515
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