Is firebase/php-jwt vulnerable?

Composer firebase/php-jwt has 4 known advisories in the phpwarden feed. Feed 2026.10.29.1, updated 2026-10-28.

4advisories

2critical

0on CISA KEV

0no fix recorded

CVE	Title	Severity	CVSS	Affected	Fixed in
CVE-2021-46743	Firebase PHP-JWT key/algorithm type confusion	critical	9.1	`<6.0.0`	`6.0.0`
CVE-2025-45769	php-jwt contains weak encryption	medium	6.5	`<7.0.0`	`7.0.0`
2015-04-02	Critical vulnerabilities in JSON Web Token libraries	unknown	0.0	`<2.0.0`	`2.0.0`
GHSA-h533-5v22-8vcp	firebase/php-jwt: "None" Algorithm treated as valid on tokens	critical	0.0	`<2.0.0`	`2.0.0`

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