personnummer/java vulnerable to Improper Input Validation
This vulnerability was reported to the personnummer team in June 2020. The slow response was due to locked ownership of some of the affected packages, which caused delays to update packages prior to disclosure.
The vulnerability is determined to be low severity.
Impact
This vulnerability impacts users who rely on the for last digits of personnummer to be a real personnummer.
Patches
The issue have been patched in all repositories. The following versions should be updated to as soon as possible:
C# 3.0.2
D 3.0.1
Dart 3.0.3
Elixir 3.0.0
Go 3.0.1
Java 3.3.0
JavaScript 3.1.0
Kotlin 1.1.0
Lua 3.0.1
PHP 3.0.2
Perl 3.0.0
Python 3.0.2
Ruby 3.0.1
Rust 3.0.0
Scala 3.0.1
Swift 1.0.1
If you are using any of the earlier packages, please update to latest.
Workarounds
The issue arrieses from the regular expression allowing the first three digits in the last four digits of the personnummer to be 000, which is invalid. To mitigate this without upgrading, a check on the last four digits can be made to make sure it's not 000x.
For more information
If you have any questions or comments about this advisory:
- Open an issue in Personnummer Meta
- Email us at Personnummer Email
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | dev.personnummer:personnummer | < 3.3.0 | 3.3.0 |
References
- Weakness (CWE)
-- Platform
- Java / Kotlin (Maven)
- Package
dev.personnummer:personnummer- Disclosed
- 23.09.2020
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-q3vw-4jx3-rrr2 - CC BY 4.0
Vulnerability history: dev.personnummer:personnummer
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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