Linux
squid3 security updates
Patch Radar has 21 security fixes for squid3, closing 51 CVEs. The newest security fix is squid3 3.5.27-1ubuntu1.14+esm6, released October 24, 2026.
Latest version
n/a
Release date not known
Security fixes
21
On record in Patch Radar
CVEs
51
Closed by those fixes
Exploited
0
Vendor report or CISA KEV
Security fixes, newest first
| Priority | Fix | Release | Fixed in | CVEs | Exploited | Released |
|---|---|---|---|---|---|---|
| High | squid3 3.5.27-1ubuntu1.14+esm6 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm6 | 6 | Oct 24, 2026 | |
| Urgent | squid3 3.5.27-1ubuntu1.14+esm4 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm4 | 1 | Oct 20, 2025 | |
| High | squid3 3.5.27-1ubuntu1.14+esm5 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm5 | 1 | Sep 26, 2025 | |
| Routine | squid3 3.5.27-1ubuntu1.14+esm3 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm3 | 1 | Jun 25, 2024 | |
| High | squid3 3.5.27-1ubuntu1.14+esm2 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm2 | 4 | Feb 14, 2024 | |
| Urgent | squid3 3.5.27-1ubuntu1.14+esm1 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm1 | 2 | Nov 6, 2023 | |
| High | squid3 3.5.27-1ubuntu1.14 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14 | 1 | Sep 22, 2022 | |
| High | squid3 3.5.27-1ubuntu1.13 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.13 | 1 | Dec 30, 2021 | |
| High | squid3 3.5.27-1ubuntu1.11 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.11 | 6 | May 28, 2021 | |
| High | squid3 3.5.27-1ubuntu1.10 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.10 | 1 | Mar 18, 2021 | |
| Routine | squid3 3.5.27-1ubuntu1.12 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.12 | 1 | Mar 9, 2021 | |
| High | squid3 3.5.27-1ubuntu1.9 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.9 | 4 | Aug 24, 2020 | |
| High | squid3 3.5.27-1ubuntu1.6 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.6 | 4 | Apr 23, 2020 | |
| High | squid3 3.5.27-1ubuntu1.7 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.7 | 4 | Apr 15, 2020 | |
| High | squid3 3.5.27-1ubuntu1.5 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.5 | 4 | Feb 4, 2020 | |
| High | squid3 4.9-2ubuntu4 | Ubuntu 20.04 LTS (focal) | 4.9-2ubuntu4 | 4 | Feb 4, 2020 | |
| High | squid3 4.9-2ubuntu1 | Ubuntu 20.04 LTS (focal) | 4.9-2ubuntu1 | 6 | Nov 26, 2019 | |
| High | squid3 3.5.27-1ubuntu1.4 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.4 | 4 | Nov 26, 2019 | |
| High | squid3 3.5.27-1ubuntu1.3 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.3 | 2 | Jul 10, 2019 | |
| Routine | squid3 3.5.27-1ubuntu1.2 | Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.2 | 2 | Jul 4, 2019 | |
| Routine | squid3 3.5.23-5ubuntu2 | Ubuntu 18.04.6 LTS (bionic) | 3.5.23-5ubuntu2 | 2 | Jan 28, 2018 |
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