decode-uri-component: Denial of service via exponential decoding of malformed percent-encoded input

보통 6.6CVE-2026-45822 · GHSA-vcc3-ghjq-m6fr · Published 30/06/2026 · updated 25/10/2026

요약

CVE-2026-45822은(는) decode-uri-component에 영향을 주는 보통 (CVSS 6.6) 취약점입니다.
향후 30일 내 악용 확률(EPSS): 0.51%, 전체 취약점의 43.3%보다 높음.
조치: 0.5.0 이상으로 업데이트하세요.

Package	Affected versions	Patched versions
decode-uri-component npm	`< 0.5.0`	`0.5.0`

Description

Impact

An attacker who can supply input to decodeUriComponent() (directly or via a dependency that uses this package on URL/query/path data) can cause excessive CPU usage and application unresponsiveness. This is an availability issue; there is no known memory corruption, data disclosure, or remote code execution impact.

Patches

Upgrade to [email protected].

Workarounds

Limit the size of the input.

NVD description

decode-uri-component through 0.4.1 is vulnerable to denial of service. The decode() function splits input on '%' producing N tokens and calls decodeComponents(), exhibiting super-linear parsing time: 200 '%ab' tokens takes approximately 0.7s, 700 tokens approximately 6s, and 1400 tokens approximately 33s. An attacker can cause significant CPU consumption and event-loop blocking via crafted input.