CVE-2026-27171 LOW

CVE-2026-27171

Vendor Zlib

Product zlib

Weakness CWE-1284

Published February 18, 2026

Last update February 18, 2026

View on NVD All CVEs

CVSS base score

2.9/10

Attack vector Local

Attack complexity High

Privileges required None

User interaction None

Confidentiality None

Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 18, 2026 CVE published

February 18, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-27171 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/1284.html