What is CVE-2020-18770?

CVE-2020-18770 is a medium-severity vulnerability in Gdraheim Zziplib, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2023-08-22.

How severe is CVE-2020-18770?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Resource exhaustion in Gdraheim Zziplib

CVE-2020-18770

An issue was discovered in function zzip_disk_entry_to_file_header in mmapped.c in zziplib 0.13.69, which will lead to a denial-of-service.

Vulnerability class: DoS (Denial of Service)

Published 2023-08-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (25.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Gdraheim Zziplib — versions 0.13.69

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

github.com/gdraheim/zziplib/issues/69 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-18770?: CVE-2020-18770 is a medium-severity vulnerability in Gdraheim Zziplib, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2023-08-22.
How severe is CVE-2020-18770?: Medium severity. CVSS v3 base score is 5.5 out of 10.