What is CVE-2026-48959?

CVE-2026-48959 is a high-severity vulnerability in Pmqs Io::uncompress::unzip, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-05-27.

How severe is CVE-2026-48959?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Pmqs Io::uncompress::unzip

CVE-2026-48959

IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward. fastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset i…

EPSS: 0.001 (15.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Pmqs Io::uncompress::unzip — versions 0

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-48959?: CVE-2026-48959 is a high-severity vulnerability in Pmqs Io::uncompress::unzip, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-05-27.
How severe is CVE-2026-48959?: High severity. CVSS v3 base score is 7.5 out of 10.