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CVE-2026-56412

CVSS 4.9 · Medium EPSS 0.10% · P1
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I. Basic Information for CVE-2026-56412

Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
libexpat projectlibexpat 0 ~ 2.8.2 -

II. Public POCs for CVE-2026-56412

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III. Intelligence Information for CVE-2026-56412

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Other References for CVE-2026-56412 (1)

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

CVE-2026-564056.9 MEDIUMlibexpat < 2.8.2 getAttributeId 整数溢出漏洞
CVE-2026-564046.9 MEDIUMlibexpat 2.8.2之前版本integer overflow漏洞
CVE-2026-564076.9 MEDIUMlibexpat<2.8.2 doProlog整数溢出漏洞
CVE-2026-564036.9 MEDIUMlibexpat <2.8.2 storeAtts整数溢出漏洞
CVE-2026-564116.9 MEDIUMlibexpat整数溢出漏洞
CVE-2026-564106.9 MEDIUMlibexpat<2.8.2 xmlwf整数溢出漏洞
CVE-2026-564086.9 MEDIUMlibexpat <2.8.2 copyString整数溢出漏洞
CVE-2026-564066.9 MEDIUMlibexpat <2.8.2 整数溢出漏洞
CVE-2026-564096.5 MEDIUMlibexpat XML解析器溢出漏洞影响软件

IV. Related Vulnerabilities

Same product: libexpat
Same vendor: libexpat project
Same weakness: CWE-416

V. Comments for CVE-2026-56412

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