decode-uri-component: Denial of service via exponential decoding of malformed percent-encoded input
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 the input.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | decode-uri-component | < 0.5.0 | 0.5.0 |
References
- https://github.com/SamVerschueren/decode-uri-component/security/advisories/GHSA-vcc3-ghjq-m6fr
- https://nvd.nist.gov/vuln/detail/CVE-2026-45822
- https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78f2a78c664005
- https://github.com/SamVerschueren/decode-uri-component
- https://github.com/SamVerschueren/decode-uri-component/blob/00662938dc7c6241547ae8abce7785cc13ffd3f6/index.js
- https://github.com/SamVerschueren/decode-uri-component/releases/tag/v0.5.0
- https://www.npmjs.com/package/decode-uri-component
- CVSS 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- Weakness (CWE)
CWE-1176, CWE-400, CWE-405, CWE-407- Platform
- npm
- Package
decode-uri-component- Disclosed
- 31.08.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vcc3-ghjq-m6fr - CC BY 4.0
Vulnerability history: decode-uri-component
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 11.2022 08.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 1
-
decode-uri-component: Denial of service via exponential decoding of malformed percent-encoded input this entry
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