CVE catalog

CVE-2016-10003

UBUNTU-CVE-2016-10003

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: Dec 16, 2016, 12:00:00 AM UTC
Updated: Sep 22, 2026, 6:17:50 AM UTC
Source: [NVD] · [CVE record]
EPSS: 4.77% · Oct 25, 2026

Incorrect HTTP Request header comparison in Squid HTTP Proxy 3.5.0.1 through 3.5.22, and 4.0.1 through 4.0.16 results in Collapsed Forwarding feature mistakenly identifying some private responses as being suitable for delivery to multiple clients.

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
Alpine	squid	3.2	`3.5.23-r0`	fixed
Alpine	squid	3.3	`3.5.23-r0`	fixed
Ubuntu	squid3	16.04	`3.3.8-1ubuntu16`	vulnerable
Ubuntu	squid3	16.04	`3.3.8-1ubuntu17`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu6`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.1`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.2`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.3`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Alpine	squid	apk	3.2	`3.5.23-r0`	Not reported	ALPINE-CVE-2016-10003	Not reported
Alpine	squid	apk	3.3	`3.5.23-r0`	Not reported	ALPINE-CVE-2016-10003	Not reported
Ubuntu	squid3	deb	16.04	`3.5.12-1ubuntu7.3`	Not reported	UBUNTU-CVE-2016-10003	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed: Oct 23, 2026, 5:18:39 PM UTC

References

[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]