CVE-2025-61728

Excessive CPU consumption when building archive index in archive/zip

Medium · published January 28, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
54.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00749 · 54.4th percentile
Published
2026-01-28T19:30Z
EPSS history
Timeline
  • 28 JAN 19:30Z
    Excessive CPU consumption when building archive index in archive/zip
    cvelistv5