HOMEVULNERABILITIESCVE-2019-11027
CRITICAL

CVE-2019-11027

NVD-CWE-noinfoPublished: June 10, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2019-11027 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

openid1 product(s)
ruby-openid
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://marc.info/?l=openid-security&m=155154717027534&w=2
ADVISORYhttps://marc.info/?l=openid-security&m=155154717027534&w=2

All References (8)

→
https://github.com/openid/ruby-openid/issues/122
→
https://lists.debian.org/debian-lts-announce/2019/10/msg00014.html
→
https://marc.info/?l=openid-security&m=155154717027534&w=2Mailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/202003-09
→
https://github.com/openid/ruby-openid/issues/122
→
https://lists.debian.org/debian-lts-announce/2019/10/msg00014.html
→
https://marc.info/?l=openid-security&m=155154717027534&w=2Mailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/202003-09

Quick Facts

CVE IDCVE-2019-11027
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedJun 10, 2019

Related CVEs (NVD-CWE-noinfo)

CVE-2012-0124
10.0
CVE-2013-4822
10.0
CVE-2013-2347
10.0
CVE-2013-6194
10.0
CVE-2012-5201
10.0
CVE-2013-4798
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-11027 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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