CVE catalog
CVE-2016-4553
squid: CVE-2016-4553
- Severity
- High · CVSS 8.6
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 79.97% · Oct 25, 2026
client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.
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 | squid | sid | 7.7-1 | not affected |
| Debian | squid | forky | 7.7-1 | not affected |
| Debian | squid | trixie | 6.13-2+deb13u3 | not affected |
| Debian | squid | trixie-security | 6.13-2+deb13u2 | not affected |
| Debian | squid | bookworm | 5.7-2+deb12u5 | not affected |
| Debian | squid | bookworm-security | 5.7-2+deb12u6 | not affected |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu3 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu4 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu5 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu6 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu6.1 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu6.2 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu6.3 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu6.4 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu6.6 | vulnerable |
| Ubuntu | squid3 | 14.04 | 3.3.8-1ubuntu6.8 | 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 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | squid | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | squid | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | squid | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | squid | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Ubuntu | squid3 | deb | 14.04 | 3.3.8-1ubuntu6.8 | Not reported | UBUNTU-CVE-2016-4553 | Not reported |
| Ubuntu | squid3 | deb | 16.04 | 3.5.12-1ubuntu7.2 | Not reported | UBUNTU-CVE-2016-4553 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [squid]Unknown
Details (4)
5.7-2+deb12u5· amd64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u5· arm64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· amd64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· arm64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
- [squid-cgi]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u5· arm64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· amd64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· arm64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
- [squidclient]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u5· arm64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· amd64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· arm64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
- [squid-common]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· all · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u5· all · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· all · bookworm-securityNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· all · bookworm-securityNot affected
dsa · squid · debian · bookworm
- [squid-openssl]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u5· arm64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· amd64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· arm64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
- [squid-purge]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u5· arm64 · bookwormNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· amd64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
5.7-2+deb12u6· arm64 · bookworm-securityNot affected
dsa · squid · debian · bookworm
Observed:
References
- [https://access.redhat.com/errata/RHSA-2016:1139]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2016_1139.json]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2016-4553]
- [https://security-tracker.debian.org/tracker/CVE-2016-4553]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]