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CVE-2026-32776

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 2.7.5之前版本存在代码问题漏洞，该漏洞源于处理空外部参数实体内容时允许空指针取消引用。

CVSS 4.0 · Medium EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 1

VendorProduct Version RangeStatus
libexpat project libexpat < 2.7.5 affected
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I. Basic Information for CVE-2026-32776

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/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 2.7.5之前版本存在代码问题漏洞，该漏洞源于处理空外部参数实体内容时允许空指针取消引用。
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 ~ 2.7.5 -

II. Public POCs for CVE-2026-32776

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III. Intelligence Information for CVE-2026-32776

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Patches & Fixes for CVE-2026-32776 (2)

Same Patch Batch · libexpat project · 2026-03-16 · 3 CVEs total

CVE-2026-32777 4.0 MEDIUM libexpat 安全漏洞
CVE-2026-32778 2.9 LOW libexpat 代码问题漏洞

IV. Related Vulnerabilities

Same product: libexpat
Same vendor: libexpat project
Same weakness: CWE-476

V. Comments for CVE-2026-32776

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