Medium

Leading white space bypasses protocol validation

  • Disclosed: 03.03.2022
  • Updated: 11.10.2026 10:22

Impact

Whitespace characters are not removed from the beginning of the protocol, so URLs are not parsed properly and protocol validation mechanisms may fail.

Patches

Patched in 1.19.9

Workarounds

Remove leading whitespace from values before passing them to URI.parse (e.g. via .href(value) or new URI(value)), e.g. by using

js
function remove_whitespace(url){
     const whitespace = /^[\x00-\x20\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]+/;
     url = url.replace(whitespace, '')
     return url
}

References

For more information

If you have any questions or comments about this advisory:

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package urijs < 1.19.9 1.19.9

References

CVSS score 5.3/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE)
CWE-20
Platform
npm
Package
urijs
Disclosed
03.03.2022
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-gmv4-r438-p67f - CC BY 4.0

Vulnerability history: urijs

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
8
First → latest
12.2020 04.2022
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 2
  • Medium 6

Disclosures per year

  1. 2020: 1
  2. 2021: 2
  3. 2022: 5
  4. 2023: 0
  5. 2024: 0
  6. 2025: 0
  7. 2026: 0
  1. High · 7.2 CVE-2022-1243 < 1.19.11 1.19.11
  2. Medium · 6.5 CVE-2022-1233 < 1.19.11 1.19.11
  3. Medium · 6.1 CVE-2022-0868 < 1.19.10 1.19.10
  4. Leading white space bypasses protocol validation this entry
    Medium · 5.3 CVE-2022-24723 < 1.19.9 1.19.9
  5. Medium · 6.5 CVE-2022-0613 < 1.19.8 1.19.8
  6. Medium · 5.3 CVE-2021-3647 < 1.19.7 1.19.7
  7. High · 7.5 CVE-2021-27516 < 1.19.6 1.19.6
  8. Medium · 6.5 CVE-2020-26291 < 1.19.4 1.19.4

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