Description
Ruby OpenID (aka ruby-openid) through 2.8.0 has a remotely exploitable flaw. This library is used by Rails web applications to integrate with OpenID Providers. Severity can range from medium to critical, depending on how a web application developer chose to employ the ruby-openid library. Developers who based their OpenID integration heavily on the "example app" provided by the project are at highest risk.
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-openid | 2.9.2debian-1 | — |
| Debian 13 | ruby-openid | 2.9.2debian-1 | — |
| Debian 12 | ruby-openid | 2.9.2debian-1 | — |
| Debian 8 | ruby-openid | 2.5.0debian-1+deb8u1 | DLA-1956-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | ruby-openid | No fix yet | — |
| Ubuntu 16.04 LTS | ruby-openid | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | ruby-openid | 2.7.0debian-1ubuntu0.18.04.1~esm1 | USN-9085-1 |
| Ubuntu Pro 16.04 LTS | ruby-openid | 2.7.0debian-1ubuntu0.16.04.1~esm1 | USN-9085-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | ruby-openid | < 2.9.0 | 2.9.0 | GHSA-fqfj-cmh6-hj49 |
Advisories 2
- USN-9085-1 ruby-openid vulnerability Ubuntu Security Notices (USN) · Nov 13, 2026
- DLA-1956-1 ruby-openid - security update Debian Security (DSA / DLA) · Mar 9, 2026