CVE-2025-45769 php-jwt contains weak encryption
Weak encryption in php-jwt allows security bypass if applications configure insufficient key lengths, requiring developers to enforce strong cryptographic settings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-45769?
CVE-2025-45769 is a medium-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
php-jwt v6.11.0 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-2025-45769?
2 open source packages ship an affected version, including firebase/php-jwt. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
firebase/php-jwt Packagist | All versions | 7.0.0 |
firebase/php-jwt Packagist | All versions | 7.0.0 |
Products include Google Firebase Php-Jwt.
How do I fix CVE-2025-45769?
Upgrade firebase/php-jwt to 7.0.0 or later.
Is CVE-2025-45769 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-45769 exists.
Other vulnerabilities in n/a
Sources
Also known as CLSA-2026-1769734644, CLSA-2026-1788348158, GHSA-2x45-7fc3-mxwq.