What is CVE-2020-35502?

CVE-2020-35502 is a high-severity vulnerability in Privoxy, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2021-03-25.

How severe is CVE-2020-35502?

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

Vulnerability in Privoxy

CVE-2020-35502

A flaw was found in Privoxy in versions before 3.0.29. Memory leaks when a response is buffered and the buffer limit is reached or Privoxy is running out of memory can lead to a system crash.

Published 2021-03-25 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.024 (83.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Privoxy
Privoxy — versions Privoxy 3.0.29

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
www.privoxy.org/3.0.29/user-manual/whatsnew.html (Release Notes, Vendor Advisory)
security.gentoo.org/glsa/202107-16 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2020-35502?: CVE-2020-35502 is a high-severity vulnerability in Privoxy, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2021-03-25.
How severe is CVE-2020-35502?: High severity. CVSS v3 base score is 7.5 out of 10.