CVE catalog

CVE-2016-1983

privoxy: CVE-2016-1983

Severity: High · CVSS 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jan 27, 2016, 8:59:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 2.87% · Oct 25, 2026

The client_host function in parsers.c in Privoxy before 3.0.24 allows remote attackers to cause a denial of service (invalid read and crash) via an empty HTTP Host header.

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

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	privoxy	source	sid	`3.0.24-1`	not yet assigned	Not reported	Not reported
Debian	privoxy	source	forky	`3.0.24-1`	not yet assigned	Not reported	Not reported
Debian	privoxy	source	trixie	`3.0.24-1`	not yet assigned	Not reported	Not reported
Debian	privoxy	source	bookworm	`3.0.24-1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[privoxy]Fixed
Details (2)
- 3.0.34-1 · amd64 · bookworm
  Fixed · Fixed: 3.0.24-1
  dsa · privoxy · debian · bookworm; dsa · privoxy · debian · 12
- 3.0.34-1 · arm64 · bookworm
  Fixed · Fixed: 3.0.24-1
  dsa · privoxy · debian · bookworm; dsa · privoxy · debian · 12

[Debian 13 (Trixie)]

[privoxy]Fixed
Details (2)
- 4.0.0-2 · amd64 · trixie
  Fixed · Fixed: 3.0.24-1
  dsa · privoxy · debian · 13
- 4.0.0-2 · arm64 · trixie
  Fixed · Fixed: 3.0.24-1
  dsa · privoxy · debian · 13

Observed: Oct 23, 2026, 5:19:47 PM UTC

References

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