Svelte 3 · Version Status
Svelte 3 End of Life Date
Svelte 3 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.
⚠
Svelte 3 is past end of life. This version no longer receives security patches. 1189 days past EOL — migrate to a supported version immediately.
EOL Date
Jun 22, 2023
1189 days past EOL
Latest Release
3.59.2
Standard release
Release Date
Apr 21, 2019
Svelte 3 series
Lifecycle detail
Svelte 3 was released on April 21, 2019 and support ended on June 22, 2023 — a supported lifespan of 4 years and 2 months, longer than the 1 year and 5 months median for Svelte releases. The last patch it will ever receive is 3.59.2, published June 20, 2023 — 2 days before support ended. It has been without security patches for 3 years and 3 months. 1 newer Svelte release has 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 Svelte 3 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| 1 |
1.64.1 |
Apr 19, 2018 |
EOL |
| 2 |
2.16.1 |
Apr 21, 2019 |
EOL |
| → 3 |
3.59.2 |
Jun 22, 2023 |
EOL |
| 4 |
4.2.20 |
Oct 19, 2024 |
EOL |
| 5 |
5.57.1 |
EOL |
Active |
What does Svelte 3 end of life mean?
When Svelte 3 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 Svelte 3 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Svelte 5 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Svelte 3 reach end of life?
Svelte 3 reached end of life on June 22, 2023. This version is no longer receiving security patches.
Is Svelte 3 still supported?
No. Svelte 3 reached end of life on June 22, 2023 and is no longer receiving security patches.
What should I upgrade to from Svelte 3?
The recommended upgrade from Svelte 3 is
Svelte 5 — the latest actively supported version. Check the
Svelte full timeline for all supported versions.
What are the security risks of running Svelte 3 past EOL?
When Svelte 3 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 Svelte should migrate immediately or implement compensating controls.