CVE-2025-45765: Weak Crypto (CVSS 9.1)

Description

ruby-jwt v3.0.0.beta1 was discovered to contain weak encryption. NOTE: the Supplier's perspective is "keysize is not something that is enforced by this library. Currently more recent versions of OpenSSL are enforcing some key sizes and those restrictions apply to the users of this gem also."

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CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-326 CWE-326

References

Other References

https://gist.github.com/ZupeiNie/c621253068ce5b64911629534879e8f9 https://github.com/jwt/ruby-jwt/issues/668

Frequently Asked Questions

What is CVE-2025-45765? +

ruby-jwt v3.0.0.beta1 was discovered to contain weak encryption. NOTE: the Supplier's perspective is "keysize is not something that is enforced by this library. Currently more recent versions of OpenSSL are enforcing some key sizes and those restrictions apply to the users of this gem also." It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2025-45765? +

CVE-2025-45765 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

How do I check if I'm vulnerable to CVE-2025-45765? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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