CVE-2025-61728

Excessive CPU consumption when building archive index in archive/zip

CVSS 6.5 MEDIUMEPSS 0.6%

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

28 Jan 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

archive/zip uses a super-linear file name indexing algorithm that is invoked the first time a file in an archive is opened. This can lead to a denial of service when consuming a maliciously constructed ZIP archive.

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

Affected products

Go standard library · archive/zip

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References

https://go.dev/cl/736713 https://go.dev/issue/77102 https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc https://pkg.go.dev/vuln/GO-2026-4342 http://www.openwall.com/lists/oss-security/2026/01/15/4