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.
Published: 2026-06-30
Score: 6.6 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 01 Jul 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Samverschueren
Samverschueren decode-uri-component
Vendors & Products Samverschueren
Samverschueren decode-uri-component

Wed, 01 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Title Denial of Service via Exponential Parsing Time in decode‑uri‑component decode-uri-component: decode-uri-component: Denial of Service via crafted input
Weaknesses CWE-1050
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Tue, 30 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 30 Jun 2026 10:45:00 +0000

Type Values Removed Values Added
Title Denial of Service via Exponential Parsing Time in decode‑uri‑component

Tue, 30 Jun 2026 08:30:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-400
CWE-407
References
Metrics cvssV4_0

{'score': 6.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber'}


Subscriptions

Samverschueren Decode-uri-component
cve-icon MITRE

Status: PUBLISHED

Assigner: seal

Published:

Updated: 2026-06-30T12:49:30.364Z

Reserved: 2026-05-13T12:03:13.545Z

Link: CVE-2026-45822

cve-icon Vulnrichment

Updated: 2026-06-30T12:49:26.577Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-06-30T08:05:36Z

Links: CVE-2026-45822 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-07-01T10:02:16Z

Weaknesses