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Medium 5.5Published Feb 18, 2026
CVE-2026-27171zlib 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.
Updated under an hour ago ()
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-1284
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
zlib zlib zlib:zlib | from 1.2.12 before 1.3.2 | NVD |
References
- https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/product
- https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdftechnical-description
- https://github.com/madler/zlib/issues/904exploit, issue-tracking
- https://github.com/madler/zlib/releases/tag/v1.3.2release-notes
- https://ostif.org/zlib-audit-complete/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.