Vulnerability in Go Standard Library Archive/tar

CVE-2025-58183

tar.Reader does not set a maximum size on the number of sparse region data blocks in GNU tar pax 1.0 sparse files. A maliciously-crafted archive containing a large number of sparse regions can cause a Reader to read an unbounded amount of data from the archive into memory. When reading from a compressed source, a small compressed input can result in large allocations.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (36.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-58183: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

References

Frequently asked questions

What is CVE-2025-58183?
CVE-2025-58183 is a medium-severity vulnerability in Go Standard Library Archive/tar, classified under CWE-400: UNCONTROLLED RESOURCE CONSUMPTION. CVSS score: 4.3/10. Published 2025-10-29.
How severe is CVE-2025-58183?
Medium severity. CVSS v3 base score is 4.3 out of 10.