Excessive CPU consumption when building archive index in archive/zip
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.
02 / AFFECTED SOFTWARE
Affected packages
157 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
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.
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.
05 / REFERENCES
Further evidence
- http://www.openwall.com/lists/oss-security/2026/01/15/4
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/61xxx/CVE-2025-61728.json
- https://go.dev/cl/736713
- https://go.dev/issue/77102
- https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc
- https://nvd.nist.gov/vuln/detail/CVE-2025-61728
- https://pkg.go.dev
- https://pkg.go.dev/vuln/GO-2026-4342