CVE catalog

CVE-2021-20216

privoxy: CVE-2021-20216

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Feb 5, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 2.28% · Oct 25, 2026

A flaw was found in Privoxy in versions before 3.0.31. A memory leak that occurs when decompression fails unexpectedly may lead to a denial of service. The highest threat from this vulnerability is to system availability.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	privoxy	sid	`4.2.0-3`	fixed
Debian	privoxy	forky	`4.2.0-3`	fixed
Debian	privoxy	trixie	`4.0.0-2`	fixed
Debian	privoxy	bookworm	`3.0.34-1`	fixed
Alpine	privoxy	3.12	`3.0.31-r0`	fixed
Alpine	privoxy	3.13	`3.0.31-r0`	fixed
Alpine	privoxy	3.14	`3.0.31-r0`	fixed
Alpine	privoxy	3.15	`3.0.31-r0`	fixed
Alpine	privoxy	3.16	`3.0.31-r0`	fixed
Alpine	privoxy	3.17	`3.0.31-r0`	fixed
Alpine	privoxy	3.18	`3.0.31-r0`	fixed
Alpine	privoxy	3.19	`3.0.31-r0`	fixed
Alpine	privoxy	3.20	`3.0.31-r0`	fixed
Alpine	privoxy	3.21	`3.0.31-r0`	fixed
Alpine	privoxy	3.22	`3.0.31-r0`	fixed
Alpine	privoxy	3.23	`3.0.31-r0`	fixed
Alpine	privoxy	3.24	`3.0.31-r0`	fixed
Ubuntu	privoxy	pro	`3.0.21-1`	vulnerable
Ubuntu	privoxy	pro	`3.0.21-2`	vulnerable
Ubuntu	privoxy	pro	`3.0.21-7+deb8u1build0.14.04.1`	vulnerable
Ubuntu	privoxy	pro	`3.0.21-7+deb8u1ubuntu0.1~esm1`	fixed
Ubuntu	privoxy	16.04	`3.0.23-3`	vulnerable
Ubuntu	privoxy	16.04	`3.0.23-4`	vulnerable
Ubuntu	privoxy	16.04	`3.0.23-5`	vulnerable
Ubuntu	privoxy	16.04	`3.0.24-1`	vulnerable
Ubuntu	privoxy	16.04	`3.0.24-1ubuntu0.1`	fixed
Ubuntu	privoxy	18.04	`3.0.26-3`	vulnerable
Ubuntu	privoxy	18.04	`3.0.26-4`	vulnerable
Ubuntu	privoxy	18.04	`3.0.26-5`	vulnerable
Ubuntu	privoxy	18.04	`3.0.26-5ubuntu0.1`	fixed
Ubuntu	privoxy	20.04	`3.0.28-2`	vulnerable
Ubuntu	privoxy	20.04	`3.0.28-2ubuntu0.1`	fixed
Suse	privoxy	package hub 15 sp2	`3.0.31-bp152.4.6.1`	fixed
Opensuse	privoxy	leap 15.2	`3.0.31-lp152.3.6.1`	fixed
Opensuse	privoxy	tumbleweed	`3.0.32-2.3`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	privoxy	source	sid	`3.0.31-1`	not yet assigned	Not reported	Not reported
Debian	privoxy	source	forky	`3.0.31-1`	not yet assigned	Not reported	Not reported
Debian	privoxy	source	trixie	`3.0.31-1`	not yet assigned	Not reported	Not reported
Debian	privoxy	source	bookworm	`3.0.31-1`	not yet assigned	Not reported	Not reported
Alpine	privoxy	apk	3.12	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.13	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.14	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.15	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.16	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.17	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.18	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.19	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.20	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.21	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.22	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.23	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Alpine	privoxy	apk	3.24	`3.0.31-r0`	Not reported	ALPINE-CVE-2021-20216	Not reported
Ubuntu	privoxy	deb	pro	`3.0.21-7+deb8u1ubuntu0.1~esm1`	Not reported	UBUNTU-CVE-2021-20216	Not reported
Ubuntu	privoxy	deb	16.04	`3.0.24-1ubuntu0.1`	Not reported	UBUNTU-CVE-2021-20216	Not reported
Ubuntu	privoxy	deb	18.04	`3.0.26-5ubuntu0.1`	Not reported	UBUNTU-CVE-2021-20216	Not reported
Ubuntu	privoxy	deb	20.04	`3.0.28-2ubuntu0.1`	Not reported	UBUNTU-CVE-2021-20216	Not reported
Suse	privoxy	rpm	package hub 15 sp2	`3.0.31-bp152.4.6.1`	Not reported	OPENSUSE-SU-2021:0279-1	Not reported
Opensuse	privoxy	rpm	leap 15.2	`3.0.31-lp152.3.6.1`	Not reported	OPENSUSE-SU-2021:0265-1	Not reported
Opensuse	privoxy	rpm	tumbleweed	`3.0.32-2.3`	Not reported	OPENSUSE-SU-2024:11193-1	Not reported

OpenFactory catalog packages

[openSUSE Tumbleweed]

[privoxy-doc]Unknown
Source package: [privoxy]
Details (1)
- 4.2.0-1.3 · noarch · tumbleweed
  Unknown · Fixed: 3.0.32-2.3
  Version impact unknown
  dsa · privoxy · opensuse · tumbleweed
[privoxy]Fixed
Source package: [privoxy]
Details (1)
- 4.2.0-1.3 · x86_64 · tumbleweed
  Fixed · Fixed: 3.0.32-2.3
  dsa · privoxy · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[privoxy]Fixed
Details (2)
- 3.0.34-1 · amd64 · bookworm
  Fixed · Fixed: 3.0.31-1
  dsa · privoxy · debian · bookworm; dsa · privoxy · debian · 12
- 3.0.34-1 · arm64 · bookworm
  Fixed · Fixed: 3.0.31-1
  dsa · privoxy · debian · bookworm; dsa · privoxy · debian · 12

[Debian 13 (Trixie)]

[privoxy]Fixed
Details (2)
- 4.0.0-2 · amd64 · trixie
  Fixed · Fixed: 3.0.31-1
  dsa · privoxy · debian · 13
- 4.0.0-2 · arm64 · trixie
  Fixed · Fixed: 3.0.31-1
  dsa · privoxy · debian · 13

Observed: Oct 23, 2026, 5:54:10 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]