decode-uri-component: Denial of service via exponential decoding of malformed percent-encoded input — GHSA-VCC3-GHJQ-M6FR

Summary

### 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 `decode-uri-component@0.5.0`. ### Workarounds Limit the size of…

Timeline

Published by source

2026-08-31

Risk context

• Reported severity or threat level: medium.
• Reported CVSS score: 6.6 out of 10.
• Reported EPSS value: 0.00507.
• Review exposure for the affected product or family: npm: decode-uri-component.

Product

npm: decode-uri-component

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-VCC3-GHJQ-M6FR

Source

GitHub

Vendor

GitHub

Published by source

2026-08-31

Last source activity

2026-08-31

Additional identifiers

CVE-2026-45822

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.