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Svelte 5.55 lifecycle

Current status

standard supportlow

Svelte 5.55 is currently in standard support.

Security: 2 tracked advisories affecting this line. Details below — lifecycle and vulnerability status are separate.

Official lifecycle source: Svelte GitHub Releases

Support phase
standard support
End of life
Not officially published
Latest release
5.55.10
Released
27 May 2026

At a glance

Version line
5.55
Initial release
23 Mar 2026
Lifecycle phase
standard support
Latest stable
5.55.10
Latest release date
27 May 2026
EOL
Not officially published
Risk
low
Releases tracked
11

Lifecycle timeline

Phases from published LifecyclePeriod records. Missing phases are not inferred.

  1. Release

    23 Mar 2026

  2. standard supportcurrent

    23 Mar 2026 → —

    Source: Svelte GitHub Releases

Svelte 5.55 is currently in standard support.

Upgrade options

Newer supported Svelte version lines from CompatHub lifecycle data. Compatibility and security context use existing evidence only.

You are on Svelte 5.55

Supported

Supported upgrade options

Open full upgrade planner for Svelte 5.55 →

Security

Advisories affecting Svelte 5.55 (OSV.dev evidence). Known exploited status, due dates, and ransomware use from CISA KEV when matched.

Known vulnerabilities
2
Known exploited
0
Highest CVSS
—
  • CVE-2026-42573GHSA-rcqx-6q8c-2c42

    Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State

    Affected:
    <5.55.7
    Fixed in:
    5.55.7
    Source:
    OSV source · Advisory
  • CVE-2026-42599GHSA-pr6f-5x2q-rwfp

    Svelte SSR vulnerable to cross-site scripting via spread attributes

    Affected:
    <5.55.7
    Fixed in:
    5.55.7
    Source:
    OSV source · Advisory

Latest release

5.55.10

Released 27 May 2026 · stable

https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.10

Previous releases

  • 5.55.9

    20 May 2026

  • 5.55.8

    18 May 2026

  • 5.55.7

    14 May 2026

Release history

11 concrete releases tracked for this line.

VersionRelease dateChannelSource
5.55.1027 May 2026stableSource
5.55.920 May 2026stableSource
5.55.818 May 2026stableSource
5.55.714 May 2026stableSource
5.55.614 May 2026stableSource
5.55.523 Apr 2026stableSource
5.55.414 Apr 2026stableSource
5.55.310 Apr 2026stableSource
5.55.27 Apr 2026stableSource
5.55.129 Mar 2026stableSource
5.55.023 Mar 2026stableSource

Release activity

Total releases
11
Last 30 days
0
Last 90 days
0
Avg. interval
~7 days
Most recent
27 May 2026

Should I use this version?

Suitable for new deployments

Svelte 5.55 is currently supported (standard support).

Version comparison

Compact comparison against the nearest relevant release lines.

5.555.57
Statusstandard supportstandard support
Latest release5.55.105.57.0
EOLNot publishedNot published
Risklowlow

Compatibility

Evidence-backed compatibility results involving Svelte 5.55. Only combinations CompatHub can evaluate from upstream sources are listed.

Compatible targets

Open Compatibility Explorer →

Sources

Where this information comes from.

Lifecycle sources

Release sources

Data coverage

Last checked = last successful upstream check. Latest source update = when upstream content last changed.

Releases tracked
11
Lifecycle periods
1
EOL
Not officially published
Provenance records
2
Data last checked
2 Sept 2026
Latest source update
2 Sept 2026

EOL: Not officially published

Other Svelte versions