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CVE-2018-16476

26
FAUCET Score

CVE-2018-16476 is a Broken Access Control vulnerability in Active Job versions 4.2.0 and later, impacting products like Red Hat CloudForms and Ruby on Rails. An attacker can manipulate user input to trigger GlobalID deserialization, leading to unauthorized information disclosure. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with no user interaction, potentially granting access to sensitive data. While there is no known active exploitation or public exploit code, the vulnerability has garnered some community and media attention, including a mention in a GitLab security release.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.2.0, < 4.2.11CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.0.7.1CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
>= 5.1.0, < 5.1.6.1CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
>= 5.2.0, < 5.2.1.1CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
4.6CPE matchmatch criteria
cpe:2.3:a:redhat:cloudforms:4.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.56%
Probability of exploitation in next 30 days
EPSS Percentile
83.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0256 is in the 71st percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (11)

redhatpatch availablevia redhat_api
Product: CloudForms Management Engine 5.9Fixed in: cfme-gemset-0:5.9.9.1-1.el7cf
View patch
redhatpatch availablevia redhat_api
Product: CloudForms Management Engine 5.9Fixed in: cfme-0:5.9.9.1-1.el7cf
View patch
redhatpatch availablevia redhat_api
Product: CloudForms Management Engine 5.9Fixed in: cfme-amazon-smartstate-0:5.9.9.1-1.el7cf
View patch
redhatpatch availablevia redhat_api
Product: CloudForms Management Engine 5.9Fixed in: cfme-appliance-0:5.9.9.1-1.el7cf
View patch
rubygemspatch availablevia ghsa
Product: activejobFixed in: 4.2.11
rubygemspatch availablevia ghsa
Product: activejobFixed in: 5.0.7.1
rubygemspatch availablevia ghsa
Product: activejobFixed in: 5.1.6.1
rubygemspatch availablevia ghsa
Product: activejobFixed in: 5.2.1.1
redhatend of lifevia redhat_api
Product: Red Hat Satellite 6Fixed in: tfm-ror51-rubygem-activejob
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-ror42-rubygem-activejob
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-ror50-rubygem-activejob

Vendor Advisories (2)

rubygemsGHSA-q2qw-rmrh-vv42high

Improper Access Control in activejob

Dec 5, 2018
redhatCVE-2018-16476Moderate

activejob: Information Exposure through deserialization using GlobalId

Nov 27, 2018

References

access.redhat.com / errata/RHSA-2019:0600
Third Party Advisory
groups.google.com / d/msg/rubyonrails-security/FL4dSdzr2zw/zjKVhF4qBAAJ
ExploitMailing ListMitigationThird Party Advisory
weblog.rubyonrails.org / 2018/11/27/Rails-4-2-5-0-5-1-5-2-have-been-released
Vendor Advisory