CVE-2026-27171
CVSS Score
2.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1284 |
| Vendor | zlib |
| Product | zlib |
| Published | Feb 18, 2026 |
| Last Updated | Feb 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
zlib / zlib
0 < 1.3.2
References
github.com: https://github.com/madler/zlib/issues/904 7asecurity.com: https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf 7asecurity.com: https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/ ostif.org: https://ostif.org/zlib-audit-complete/ github.com: https://github.com/madler/zlib/releases/tag/v1.3.2