CVE-2026-42570 (GCVE-0-2026-42570)

Vulnerability from cvelistv5 – Published: 2026-06-09 16:12 – Updated: 2026-07-15 00:57
VLAI
Title
Svelte devalue: DoS via sparse array deserialization
Summary
Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 18:06 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version CPE status
sveltejs devalue Affected: >= 5.6.3, < 5.8.1
guessed Create a notification for this product.
Red Hat Red Hat Trusted Artifact Signer 1.4 Unaffected: 1783327185 , < * (rpm)
    cpe:/a:redhat:trusted_artifact_signer:1.4::el9
Create a notification for this product.
Red Hat Red Hat Build of Podman Desktop     cpe:/a:redhat:podman_desktop:1
Create a notification for this product.
Show details on NVD website
To clipboard 

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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.