Vulnerability Database · Packagist · firebase/php-jwt · Version
firebase/php-jwt v5.1.0
v5.1.0 is affected by 3 vulnerabilities.
The vulnerabilities that cover this exact version are listed below with the fixed version to move to.
Critical 2 High 1 Medium 0 Low 0 Unrated 0
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Database updated 23/Oct/2026
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01 Vulnerabilities affecting this version
firebase/php-jwt v5.1.0 vulnerabilities
3 vulnerabilities cover firebase/php-jwt v5.1.0. Open the full list in the database.
| Vulnerability | Severity | Fixed version | Disclosed |
|---|---|---|---|
| CVE-2021-46743: Firebase PHP-JWT key/algorithm type confusion | 9.1 critical | 6.0.0 | 30 Mar 2022 |
| CVE-2025-45769: Weak Encryption in firebase/php-jwt Package | 7.3 high | 7.0.0 | 31 Jul 2025 |
| Critical Vulnerability in firebase/php-jwt: "None" Algorithm Treated as Valid on Tokens | N/A critical | 2.0.0 | 15 May 2024 |
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Questions
About firebase/php-jwt v5.1.0
Is firebase/php-jwt v5.1.0 vulnerable?
Yes. 3 vulnerabilities in the Vulert database cover firebase/php-jwt v5.1.0: 2 critical, 1 high, 0 medium and 0 low. Each entry above names the fixed version to move to.
How do I monitor firebase/php-jwt for upcoming vulnerabilities?
Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the firebase/php-jwt version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.