Kirby 4 · Version Status
Kirby 4 End of Life Date
Kirby 4 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.
⚡
Kirby 4 reaches end of life on November 28, 2026. Plan your migration now — 66 days remaining.
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EOL Date
Nov 28, 2026
66 days remaining
Latest Release
4.9.6
Standard release
Release Date
Nov 28, 2023
Kirby 4 series
Lifecycle detail
Kirby 4 was released on November 28, 2023 and support is scheduled to end on November 28, 2026 — a planned supported lifespan of 3 years, in line with the 2 years and 11 months median for Kirby releases. Its most recent patch is 4.9.6, published September 16, 2026.
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 Kirby 4 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| 1.0 |
1.0.9 |
Feb 1, 2016 |
EOL |
| 1.1 |
1.1.2 |
Feb 1, 2016 |
EOL |
| 2.0 |
2.0.6 |
Jan 1, 2021 |
EOL |
| 2.1 |
2.1.1 |
Jan 1, 2021 |
EOL |
| 2.2 |
2.2.3 |
Jan 1, 2021 |
EOL |
| 2.3 |
2.3.3 |
Jan 1, 2021 |
EOL |
| 2.4 |
2.4.2 |
Jan 1, 2021 |
EOL |
| 2.5 |
2.5.14 |
Jan 1, 2021 |
EOL |
What does Kirby 4 end of life mean?
When Kirby 4 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 Kirby 4 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Kirby 5 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Kirby 4 reach end of life?
Kirby 4 reached end of life on November 28, 2026. That is 66 days remaining.
Is Kirby 4 still supported?
Kirby 4 is still supported but approaching end of life on November 28, 2026. Begin planning your migration now.
What should I upgrade to from Kirby 4?
The recommended upgrade from Kirby 4 is
Kirby 5 — the latest actively supported version. Check the
Kirby full timeline for all supported versions.
What are the security risks of running Kirby 4 past EOL?
When Kirby 4 reaches end of life, the maintainers stop issuing 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 Kirby should migrate immediately or implement compensating controls.