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CVE-2025-71406— Nokogiri before 1.18.4 Use-After-Free via libxslt

Quick assessment

Affected
sparklemotion nokogiri
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.

在 Nokogiri 1.18.4 之前的版本中，其捆绑的 libxslt 库版本低于 1.1.43，其中包含两个使用-after-free（use-after-free）漏洞：CVE-2025-24855（因 xsltEvalXPathStringNs 泄漏 xpathCtxt->node 导致的 XPath 上下文节点使用-after-free）和 CVE-2024-55549（与排除的结果前缀/命名空间相关的使用-after-free）。处理精心构造的 XSLT 文件可能触发内存损坏。Nokogiri 1.1

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
sparklemotion nokogiri < 1.18.4 affected
1.18.4 unaffected
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I. Basic Information for CVE-2025-71406

Vulnerability Information
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Vulnerability Title
Nokogiri before 1.18.4 Use-After-Free via libxslt
Source: CVE Program / CVE List V5
Vulnerability Description
Nokogiri before 1.18.4 bundles a vulnerable version of libxslt (prior to 1.1.43) that contains two use-after-free vulnerabilities: CVE-2025-24855 (use-after-free of the XPath context node due to xsltEvalXPathStringNs leaking xpathCtxt->node) and CVE-2024-55549 (use-after-free related to excluded result prefixes/namespaces). Processing crafted XSLT can trigger memory corruption. Nokogiri 1.18.4 upgrades the bundled libxslt to 1.1.43 to resolve these issues.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
sparklemotion nokogiri 0 ~ 1.18.4 -

II. Public POCs for CVE-2025-71406

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III. Intelligence Information for CVE-2025-71406

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Vendor Advisories for CVE-2025-71406 (1)

Other References for CVE-2025-71406 (1)

Same Patch Batch · sparklemotion · 2026-08-25 · 14 CVEs total

CVE-2024-58378 9.8 CRITICAL Nokogiri before 1.16.2 Use-After-Free via xmlTextReader
CVE-2022-51000 9.8 CRITICAL Nokogiri before 1.13.2 Multiple Vulnerabilities via libxml2 libxslt
CVE-2025-71407 9.8 CRITICAL Nokogiri before 1.18.3 Stack Buffer Overflow and Use-After-Free
CVE-2022-50999 8.6 HIGH Nokogiri before 1.13.5 Integer Overflow via libxml2
CVE-2023-54354 7.5 HIGH Nokogiri before 1.14.3 Null Pointer Dereference via libxml2
CVE-2026-79770 7.5 HIGH Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer
CVE-2022-50998 7.5 HIGH Nokogiri before 1.13.9 Multiple Vulnerabilities via libxml2
CVE-2021-47996 7.5 HIGH Nokogiri before 1.11.4 Multiple Vulnerabilities via libxml2
CVE-2026-79769 5.5 MEDIUM Nokogiri before 1.19.4 Invalid Memory Read via initialize_copy_with_args
CVE-2026-79771 5.3 MEDIUM Nokogiri before 1.19.3 Memory Leak via XSLT Transform
CVE-2026-79772 5.3 MEDIUM Nokogiri before 1.19.1 Unchecked Return Value canonicalize
CVE-2025-71346 2.9 LOW Nokogiri before 1.18.8 Heap Buffer Under-read via XML Schema
CVE-2024-58377 Nokogiri before 1.16.5 libxml2 Dependency Update

IV. Related Vulnerabilities

Same product: nokogiri
Same vendor: sparklemotion
Same weakness: CWE-416

V. Comments for CVE-2025-71406

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