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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | php-lcobucci-jwt | No fix yet | — |
| Debian 13 | php-lcobucci-jwt | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | php-lcobucci-jwt | No fix yet | — |
| Ubuntu 26.04 LTS | php-lcobucci-jwt | No fix yet | — |
| Ubuntu 25.10 | php-lcobucci-jwt | No fix yet | — |
| Ubuntu 24.04 LTS | php-lcobucci-jwt | No fix yet | — |