CVE-2025-61728

Excessive CPU consumption when building archive index in archive/zip

State: Published
Severity: 6.5 Medium
Published: Jan 28, 2026
Updated: Jan 29, 2026
Reserved: Sep 30, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
archive/zipGo standard library	before 1.24.12Affected 1.25.0 to before 1.25.6Affected

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

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