CVE-2026-27171
5.5
MEDIUM
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2026-27171
To remediate CVE-2026-27171, upgrade the affected package to a fixed version below.
- Alpine/zlib—upgrade to 1.3.2-r0 or later
- Debian/zlib—no fix listed
Is CVE-2026-27171 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.3.2-r0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |