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CVE-2026-40073

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.57.1, under certain circumstances, requests could bypass the BODY_SIZE_LIMIT on SvelteKit applications running with adapter-node. This bypass does not affect body size limits at other layers of the application stack, so limits enforced in the WAF, gateway, or at the platform level are unaffected. This vulnerability is fixed in 2.57.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:eb3704ff9e08afd082281bad8541881d484e0b6184139ddc3679f33b5e3989b5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"kit","vendor":"sveltejs","versions":[{"status":"affected","version":"< 2.57.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:49c41f7e61ce92ba9931d7fb0812b60375c6c2f6c1aded45db3ac964cdde6db9 · sha256:48b78dc4e58299e0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:49c41f7e61ce92ba9931d7fb0812b60375c6c2f6c1aded45db3ac964cdde6db9 · sha256:48b78dc4e58299e0… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:49c41f7e61ce92ba9931d7fb0812b60375c6c2f6c1aded45db3ac964cdde6db9 · sha256:48b78dc4e58299e0… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/sveltejs/kit/commit/3202ed6c98f9e8d86bf0c4c7ad0f2e273e5e3b95","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/commit/3202ed6c98f9e8d86bf0c4c7ad0f2e273e5e3b95"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:49c41f7e61ce92ba9931d7fb0812b60375c6c2f6c1aded45db3ac964cdde6db9 · sha256:48b78dc4e58299e0… · /containers/cna/references/1
{"name":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.57.1","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.57.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:49c41f7e61ce92ba9931d7fb0812b60375c6c2f6c1aded45db3ac964cdde6db9 · sha256:48b78dc4e58299e0… · /containers/cna/references/2
{"name":"https://github.com/sveltejs/kit/security/advisories/GHSA-2crg-3p73-43xp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sveltejs/kit/security/advisories/GHSA-2crg-3p73-43xp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:49c41f7e61ce92ba9931d7fb0812b60375c6c2f6c1aded45db3ac964cdde6db9 · sha256:48b78dc4e58299e0… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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