Squid 6 · Version Status
Squid 6 End of Life Date
Squid 6 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
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Squid 6 is past end of life. This version no longer receives security patches. 485 days past EOL — migrate to a supported version immediately.
EOL Date
Jul 10, 2025
485 days past EOL
Latest Release
6.14
Standard release
Release Date
Jul 6, 2023
Squid 6 series
Where these dates come from
End of lifeJul 10, 2025endoflife.date (open dataset) · endoflife.datemedium · 1 source agrees ReleaseJul 6, 2023endoflife.date (open dataset) · endoflife.datemedium · 1 source agrees Confidence: high = two or more independent sources agree (the vendor's page read by our adapter, a person's check against the vendor, the dataset the date came from); medium = one; low = the vendor page disagrees or our last read is stale.
How we source dates.
Lifecycle detail
Squid 6 was released on July 6, 2023 and support ended on July 10, 2025 — a supported lifespan of 2 years, shorter than the 2 years and 9 months median for Squid releases. Its latest release on record is 6.14, published June 24, 2025 — 16 days before support ended. It has been past its end-of-life date for 1 year and 4 months.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
Extended Support
Extended Squid 6 support options
Some vendors and third parties sell security patches beyond end of life; whether one covers this version varies. Compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| 2.4 |
2.4.7 |
Jul 2, 2002 |
EOL |
| 2.5 |
2.5.14 |
May 20, 2006 |
EOL |
| 2.6 |
2.6.24 |
Mar 26, 2010 |
EOL |
| 3.0 |
3.0.26 |
Aug 27, 2011 |
EOL |
| 2.7 |
2.7.9 |
Mar 14, 2010 |
EOL |
| 3.1 |
3.1.23 |
Jan 8, 2013 |
EOL |
| 3.2 |
3.2.14 |
May 1, 2015 |
EOL |
| 3.3 |
3.3.14 |
May 1, 2015 |
EOL |
What does Squid 6 end of life mean?
When Squid 6 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Squid 6 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Squid 7 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Squid 6 reach end of life?
Squid 6 reached end of life on July 10, 2025. This version is no longer receiving security patches.
Is Squid 6 still supported?
No. Squid 6 reached end of life on July 10, 2025 and is no longer receiving security patches.
What should I upgrade to from Squid 6?
The recommended upgrade from Squid 6 is
Squid 7 — the latest actively supported version. Check the
Squid full timeline for all supported versions.
What are the security risks of running Squid 6 past EOL?
Since Squid 6 reached end of life, the maintainers no longer issue security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Squid should migrate immediately or implement compensating controls.