Mattermost 11.4 · Version Status
Mattermost 11.4 End of Life Date
Mattermost 11.4 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.
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Mattermost 11.4 is past end of life. This version no longer receives security patches. 153 days past EOL — migrate to a supported version immediately.
EOL Date
May 15, 2026
153 days past EOL
Latest Release
11.4.5
Standard release
Release Date
Feb 16, 2026
Mattermost 11.4 series
Lifecycle detail
Mattermost 11.4 was released on February 16, 2026 and support ended on May 15, 2026 — a supported lifespan of 3 months, in line with the 3 months median for Mattermost releases. It was not an LTS release; Mattermost reserves longer patch windows for its LTS versions. The last patch it will ever receive is 11.4.5, published April 22, 2026 — 23 days before support ended. It has been without security patches for 5 months. 4 newer Mattermost releases have shipped since.
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 Mattermost 11.4 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| 6.0 |
6.0.4 |
Jan 15, 2022 |
EOL |
| 6.1 |
6.1.3 |
Feb 15, 2022 |
EOL |
| 6.2 |
6.2.5 |
Mar 15, 2022 |
EOL |
| 6.3 LTS |
6.3.10 |
Oct 15, 2022 |
EOL |
| 6.4 |
6.4.3 |
May 15, 2022 |
EOL |
| 6.5 |
6.5.2 |
Jun 15, 2022 |
EOL |
| 6.6 |
6.6.2 |
Jul 15, 2022 |
EOL |
| 6.7 |
6.7.2 |
Aug 15, 2022 |
EOL |
What does Mattermost 11.4 end of life mean?
When Mattermost 11.4 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 Mattermost 11.4 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Mattermost 11.7 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Mattermost 11.4 reach end of life?
Mattermost 11.4 reached end of life on May 15, 2026. This version is no longer receiving security patches.
Is Mattermost 11.4 still supported?
No. Mattermost 11.4 reached end of life on May 15, 2026 and is no longer receiving security patches.
What should I upgrade to from Mattermost 11.4?
The recommended upgrade from Mattermost 11.4 is
Mattermost 11.7 — the latest actively supported version. Check the
Mattermost full timeline for all supported versions.
What are the security risks of running Mattermost 11.4 past EOL?
When Mattermost 11.4 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 Mattermost should migrate immediately or implement compensating controls.