CVE-2026-86141
Quick assessment
Affected
xmlsoft libxml2
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.
libxml2 在 2.15.4 之前的版本中， 模块存在一个空指针解引用（NULL pointer dereference）漏洞。具体表现为：在 函数中，当 调用失败（返回 NULL）后，代码未正确处理该失败情况——即在检查 NULL 后没有计算字符串长度，从而导致解引用了空指针。
Possible ATT&CK Techniques 1 AI
T1203.001
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I. Basic Information for CVE-2026-86141
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate a string length after NULL checking.
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
未加检查的返回值
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-86141
| # | POC Description | Source Link | Shenlong Link |
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Other References for CVE-2026-86141 (3)
Same Patch Batch · xmlsoft · 2026-09-05 · 8 CVEs total
| CVE-2026-86140 | 8.0 HIGH | libxml2<2.15.4 valid.c strcat栈溢出 |
| CVE-2026-86143 | 6.9 MEDIUM | libxml2 2.15.4 前 xmlIO 整数溢出 |
| CVE-2026-86142 | 6.9 MEDIUM | libxml2 2.15.4前 xpointer堆溢出 |
| CVE-2026-86139 | 6.9 MEDIUM | libxml2 2.15.4 前 xmlURIEscapeStr 整数溢出 |
| CVE-2026-86138 | 6.9 MEDIUM | libxml2<2.15.4整数溢出致堆缓冲区溢出 |
| CVE-2026-86144 | 5.6 MEDIUM | libxml2 2.15.4前XInclude未传播解析标志致SSRF漏洞 |
| CVE-2026-86137 | 2.9 LOW | libxml2 <2.15.4 越界读取漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-86141
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