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CVE-2022-50998— Nokogiri before 1.13.9 Multiple Vulnerabilities via libxml2

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.

Nokogiri 1.13.9 之前版本（基于 CRuby 实现并使用内置库的版本）打包了 libxml2 v2.9.14，该版本受以下漏洞影响：CVE-2022-40304（当实体内容从字典分配时，实体引用循环可能导致数据损坏或双重释放）和 CVE-2022-40303（在使用 XML_PARSE_HUGE 标志解析时可能发生整数溢出）。Nokogiri 1.13.9 已将内置的 libxml2 升级至 v2.10.3，以修复这些问题。处理精心构造的 XML 输入可能导致拒绝服务（DoS）或内存损坏。（该安全公告

CVSS 7.5 · High Updated Aug 25, 2026

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

Vendor	Product	Version Range	Status
sparklemotion	nokogiri	`< 1.13.9`	affected
		`1.13.9`	unaffected

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Vulnerability Information

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Vulnerability Title

Nokogiri before 1.13.9 Multiple Vulnerabilities via libxml2

Source: CVE Program / CVE List V5

Vulnerability Description

Nokogiri before 1.13.9 (CRuby implementation using packaged libraries) bundles libxml2 v2.9.14, which is affected by CVE-2022-40304 (data corruption / double-free from an entity reference cycle when entity content is allocated from a dict) and CVE-2022-40303 (integer overflows when parsing with XML_PARSE_HUGE). Nokogiri 1.13.9 upgrades the packaged libxml2 to v2.10.3 to address these issues. Processing crafted XML input may lead to denial of service or memory corruption. (The advisory also references CVE-2022-2309, a NULL pointer dereference via iterwalk/canonicalize, which maintainers determined does not affect Nokogiri users.)

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

空指针解引用

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
sparklemotion	nokogiri	0 ~ 1.13.9	-

II. Public POCs for CVE-2022-50998

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2022-50998

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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-2025-71406	7.8 HIGH	Nokogiri before 1.18.4 Use-After-Free via libxslt
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-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-476

V. Comments for CVE-2022-50998

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2022-50998— Nokogiri before 1.13.9 Multiple Vulnerabilities via libxml2

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 2

I. Basic Information for CVE-2022-50998

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2022-50998

III. Intelligence Information for CVE-2022-50998

Patches & Fixes for CVE-2022-50998 (2)

Vendor Advisories for CVE-2022-50998 (1)

Other References for CVE-2022-50998 (1)

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

IV. Related Vulnerabilities

V. Comments for CVE-2022-50998

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