GO-2026-4342

vendorUSosv

Excessive CPU consumption when building archive index in archive/zip

view advisory published 2026-01-28Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2025-61728US	—	0.75% (54th)	—	2026-01-28
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 ma…

references

External citations — patches, advisories, analysis.

https://go.dev/cl/736713FIX
https://go.dev/issue/77102REPORT
https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUcWEB

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