CVE-2025-45770 Weak cryptography in n/a
The JWT library may use weak encryption if the application does not configure sufficient key lengths, potentially exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-45770?
CVE-2025-45770 is a high-severity vulnerability in n/a, published on 31 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-326
Which versions are affected by CVE-2025-45770?
It affects 1 product.
Products include Jwt Project Jwt.
How do I fix CVE-2025-45770?
No fix has been published for CVE-2025-45770 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-45770 being exploited?
There is no known exploitation of CVE-2025-45770 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-45770, GHSA-hp45-3w87-63c3, MINI-4vmq-c2wg-3j3h, UBUNTU-CVE-2025-45770.