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CVE-2025-6494— sparklemotion nokogiri hashmap.c hashmap_get_with_hash heap-based overflow

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是一款用于解析Ruby中HTML和XML的开源软件库。 Nokogiri 1.18.7及之前版本存在安全漏洞，该漏洞源于文件gumbo-parser/src/hashmap.c中函数hashmap_get_with_hash存在堆缓冲区溢出。

CVSS 3.3 · Low EPSS 0.16% · P5
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I. Basic Information for CVE-2025-6494

Vulnerability Information
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Vulnerability Title
sparklemotion nokogiri hashmap.c hashmap_get_with_hash heap-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in sparklemotion nokogiri c29c920907366cb74af13b4dc2230e9c9e23b833. It has been classified as problematic. This affects the function hashmap_get_with_hash of the file gumbo-parser/src/hashmap.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The patch is named ada4708e5a67114402cd3feb70a4e1d1d7cf773a. It is recommended to apply a patch to fix this issue. The project maintainer explains that the affected code was merged into the main branch but the commit never appeared in an official release.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Nokogiri 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nokogiri是一款用于解析Ruby中HTML和XML的开源软件库。 Nokogiri 1.18.7及之前版本存在安全漏洞，该漏洞源于文件gumbo-parser/src/hashmap.c中函数hashmap_get_with_hash存在堆缓冲区溢出。
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
sparklemotion nokogiri c29c920907366cb74af13b4dc2230e9c9e23b833 -

II. Public POCs for CVE-2025-6494

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III. Intelligence Information for CVE-2025-6494

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Other References for CVE-2025-6494 (1)

IV. Related Vulnerabilities

Same product: nokogiri
Same vendor: sparklemotion
Same weakness: CWE-122

V. Comments for CVE-2025-6494

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