CVE-2025-45770: jwt Weak Crypto (CVSS 7)

Description

jwt v5.4.3 was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1.4, 4.1.14, and other rules; the dispute tagging is not meant to recommend an outcome for this CVE Record.

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CVSS v3.1 Score

7.0

HIGH

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

Weakness Type (CWE)

CWE-326 CWE-326

Affected Products

Vendor	Product	Versions
jwt_project	jwt	< 5.4.3

References

Other References

https://gist.github.com/ZupeiNie/cd88c827eef11a1618f8baacccd240fb https://github.com/lcobucci https://github.com/lcobucci/jwt

Frequently Asked Questions

What is CVE-2025-45770? +

jwt v5.4.3 was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1.4, 4.1.14, and other rules; the dispute tagging is not meant to recommend an outcome for this CVE Record. It has a CVSS v3.1 base score of 7.0 (HIGH).

How severe is CVE-2025-45770? +

CVE-2025-45770 has a CVSS v3.1 score of 7.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-45770? +

CVE-2025-45770 affects products from jwt_project, specifically: jwt. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-45770? +

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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