What is CVE-2025-61728?

CVE-2025-61728 is a medium-severity vulnerability in Golang Go, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-01-28.

How severe is CVE-2025-61728?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Golang Go

CVE-2025-61728

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.

Published 2026-01-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (53.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.001

Affected products

Golang Go
Go Standard Library Archive/zip — versions 0, 1.25.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

go.dev/cl/736713 (Patch)
go.dev/issue/77102 (Patch)
groups.google.com/g/golang-announce/c/Vd2tYVM8eUc (Release Notes)
pkg.go.dev/vuln/GO-2026-4342 (Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2025-61728?: CVE-2025-61728 is a medium-severity vulnerability in Golang Go, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-01-28.
How severe is CVE-2025-61728?: Medium severity. CVSS v3 base score is 6.5 out of 10.