Description
The json-jwt gem before 1.11.0 for Ruby lacks an element count during the splitting of a JWE string.
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 | ruby-json-jwt | 1.11.0-1 | — |
| Debian 13 | ruby-json-jwt | 1.11.0-1 | — |
| Debian 12 | ruby-json-jwt | 1.11.0-1 | — |
| Debian 9 | ruby-json-jwt | 1.6.2-1+deb9u2 | DLA-2390-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | ruby-json-jwt | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP5 | rubygem-aes_key_wrap | 1.1.0-bp155.2.1 | openSUSE-SU-2025:0004-1 |
| SUSE Package Hub 15 SP5 | rubygem-json-jwt | 1.16.6-bp155.3.3.1 | openSUSE-SU-2025:0004-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | rubygem-aes_key_wrap | 1.1.0-bp155.2.1 | openSUSE-SU-2025:0004-1 |
| openSUSE Leap 15.5 | rubygem-json-jwt | 1.16.6-bp155.3.3.1 | openSUSE-SU-2025:0004-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | json-jwt | < 1.11.0 | 1.11.0 | GHSA-cff7-6h4q-q5pj |
Advisories 2
- DLA-2390-1 ruby-json-jwt - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2025:0004-1 Security update for rubygem-json-jwt SUSE / openSUSE Security Updates · Feb 4, 2026