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CVE-2026-27171

CVSS 2.9 · Low EPSS 0.01% · P1
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I. Basic Information for CVE-2026-27171

Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
zlib before 1.3.2 allows CPU consumption via crc32_combine64 and crc32_combine_gen64 because x2nmodp can do right shifts within a loop that has no termination condition.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1284
Source: NVD (National Vulnerability Database)
Vulnerability Title
zlib 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zlib是美国Mark Adler个人开发者的一个通用的数据压缩库。 zlib 1.3.2之前版本存在安全漏洞，该漏洞源于crc32_combine64和crc32_combine_gen64函数中的x2nmodp可以在没有终止条件的循环内进行右移操作，可能导致CPU消耗。
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

VendorProductAffected VersionsCPESubscribe
zlibzlib 0 ~ 1.3.2 -

II. Public POCs for CVE-2026-27171

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III. Intelligence Information for CVE-2026-27171

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IV. Related Vulnerabilities

Same product: zlib
Same weakness: CWE-1284

V. Comments for CVE-2026-27171

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