CVE-2026-27171

CVSS 2.9 LOWEPSS 0.2%CWE-1284

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 2.9EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

18 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

zlib · zlib

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf https://github.com/madler/zlib/issues/904 https://github.com/madler/zlib/releases/tag/v1.3.2 https://ostif.org/zlib-audit-complete/