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CVE-2019-11027

30
FAUCET Score

CVE-2019-11027 describes a remotely exploitable flaw in Ruby OpenID (ruby-openid) versions up to 2.8.0, a library used by Rails web applications for OpenID integration. This vulnerability carries a critical CVSS score of 9.8, indicating a network-based attack with low complexity, requiring no user interaction, and leading to high impact on confidentiality, integrity, and availability. While the severity can vary based on implementation, applications heavily relying on the project's example app are at highest risk. There is currently no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) or significant community discussion or media coverage has been observed.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.8.0CPE matchmatch criteria
cpe:2.3:a:openid:ruby-openid:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.97%
Probability of exploitation in next 30 days
EPSS Percentile
85.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0297 is in the 77th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rubygemspatch availablevia ghsa
Product: ruby-openidFixed in: 2.9.0
redhatno patchvia redhat_api
Product: Red Hat 3scale API Management Platform 2Fixed in: ruby-openid

Vendor Advisories (2)

rubygemsGHSA-fqfj-cmh6-hj49critical

ruby-openid SSRF via claimed_id request

Jun 13, 2019
redhatCVE-2019-11027Moderate

rubygem-ruby-openid: Unknown remotely exploitable flaw

Jun 10, 2019

References

github.com / openid/ruby-openid/issues/122
lists.debian.org / debian-lts-announce/2019/10/msg00014.html
marc.info
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202003-09