Ruby OpenID (aka ruby-openid) through 2.8.0 has a remotely exploitable flaw.
Priority MEDIUM 47CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
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.
Why it matters now
EPSS 0.02968 87th percentileScored 2026-11-07
Fix Partial ruby-openid (RubyGems): 2.9.0Red Hat: 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | ruby-openid (RubyGems) | before 2.9.0 | 2.9.0 | Patch available | GHSA-fqfj-cmh6-hj49 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- ruby-openid (RubyGems) Vendor— Affected before 2.9.0 Fixed in 2.9.0 Patch available GHSA-fqfj-cmh6-hj49
Remediation
- Fix · GHSA-fqfj-cmh6-hj49 ruby-openid (RubyGems) Fixed in 2.9.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat 3scale API Management Platform 2 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2019-11027
- 2026-10-03 Alias added: GHSA-fqfj-cmh6-hj49
References
Advisory 3
Other 6
- https://github.com/openid/ruby-openid/issues/122
- [debian-lts-announce] 20191011 [SECURITY] [DLA 1956-1] ruby-openid security update
- https://github.com/openid/ruby-openid/commit/d181a8a2099c64365a1d24b29f6b6b646673a131
- https://github.com/openid/ruby-openid
- https://github.com/openid/ruby-openid/releases/tag/v2.9.0
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-openid/CVE-2019-11027.yml
Sources
- CVE-2019-11027 · CVE Program
- CVE-2019-11027 · NVD
- FIRST EPSS
- GHSA-fqfj-cmh6-hj49 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-11027 · Red Hat security data · CC BY 4.0
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