CVE-2026-118664

decode-uri-component provides a more robust alternative to decodeURIComponent. Prior to 0.5.1, decodeUriComponent in index.js falls back to customDecodeURIComponent after native decoding throws, and the fallback collects every distinct percent-encoded run before performing a full-string regular-expression replacement for each entry. Malformed input containing many distinct runs can therefore make both the number of replacements and the scanned input length grow together, causing quadratic CPU consumption and blocking the Node.js event loop; request-body inputs can reach the demonstrated size, while ordinary URL header limits reduce the practical delay. This issue is fixed in version 0.5.1.

CVSS

No CVSS.

References

Link	Resource
https://github.com/SamVerschueren/decode-uri-component/commit/fad01d65b93bd3f2f0dc32dfd8d57a38b57bc608
https://github.com/SamVerschueren/decode-uri-component/releases/tag/v0.5.1
https://github.com/SamVerschueren/decode-uri-component/security/advisories/GHSA-qr28-fpjm-wq7f

Configurations

No configuration.

History

28 Oct 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-28 21:16

Updated : 2026-10-29 18:17

NVD link : CVE-2026-118664

Mitre link : CVE-2026-118664

CVE.ORG link : CVE-2026-118664

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-407

Inefficient Algorithmic Complexity

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