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Fencer Intel
medium 4.3

CVE-2026-86323 json

Foreman: authorization flaw in the mail-notification endpoints implemented by api::v2::mailnotificationscontroller

published 2d ago modified yesterday also EUVD-2026-124676

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

A flaw was found in Foreman’s Api::V2::MailNotificationsController, where authorization checks on user-specific mail-notification resources are insufficient. The GET /api/v2/users/:id/mail_notifications endpoint resolves the target account using User.find(params[:id]) without verifying that the authenticated user is authorized to access that user’s notification configuration. Additionally, the POST and PUT /api/v2/users/:user_id/mail_notifications paths call deny_access when the requester is unauthorized but fail to halt execution, allowing the request to continue and persist the unauthorized change despite a 403 response or subsequent DoubleRenderError. This can allow a user to disclose another user’s mail-notification configuration, including mail_query values, and, where write permissions apply, modify or create notification settings for another user.

Patch / fix

  • Red Hat Red Hat Satellite 6.16 for RHEL 8 0:3.12.0.26-1.el8sat
  • Red Hat Red Hat Satellite 6.16 for RHEL 9 0:3.12.0.26-1.el9sat
  • Red Hat Red Hat Satellite 6.17 for RHEL 9 0:3.14.0.26-1.el9sat
  • Red Hat Red Hat Satellite 6.18 for RHEL 9 0:3.16.0.29-1.el9sat
  • Red Hat Red Hat Satellite 6.19 for RHEL 9 0:3.18.0.19-1.el9sat

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-86323 updated cvss 4.3

foreman: authorization flaw in the mail-notification endpoints implemented by Api::V2::MailNotificationsController

  • Red Hat Satellite 6.16 for RHEL 8 foreman 3.12.0.26-1.el8sat, foreman-cli 3.12.0.26-1.el8sat, foreman-ec2 3.12.0.26-1.el8sat, foreman-pcp 3.12.0.26-1.el8sat, foreman-ovirt 3.12.0.26-1.el8sat, foreman-redis 3.12.0.26-1.el8sat, +8 more Red Hat Satellite 6.16 for RHEL 9 foreman 3.12.0.26-1.el9sat, foreman-cli 3.12.0.26-1.el9sat, foreman-ec2 3.12.0.26-1.el9sat, foreman-pcp 3.12.0.26-1.el9sat, foreman-ovirt 3.12.0.26-1.el9sat, foreman-redis 3.12.0.26-1.el9sat, +8 more
    fixed: vendor fix RHSA-2026:99949
  • Red Hat Satellite 6.17 for RHEL 9 foreman 3.14.0.26-1.el9sat, foreman-cli 3.14.0.26-1.el9sat, foreman-ec2 3.14.0.26-1.el9sat, foreman-pcp 3.14.0.26-1.el9sat, foreman-ovirt 3.14.0.26-1.el9sat, foreman-redis 3.14.0.26-1.el9sat, +8 more
    fixed: vendor fix RHSA-2026:99950
  • Red Hat Satellite 6.18 for RHEL 9 foreman 3.16.0.29-1.el9sat, foreman-cli 3.16.0.29-1.el9sat, foreman-ec2 3.16.0.29-1.el9sat, foreman-pcp 3.16.0.29-1.el9sat, foreman-redis 3.16.0.29-1.el9sat, foreman-vmware 3.16.0.29-1.el9sat, +7 more
    fixed: vendor fix RHSA-2026:99952
  • Red Hat Satellite 6.19 for RHEL 9 foreman 3.18.0.19-1.el9sat, foreman-cli 3.18.0.19-1.el9sat, foreman-ec2 3.18.0.19-1.el9sat, foreman-pcp 3.18.0.19-1.el9sat, foreman-redis 3.18.0.19-1.el9sat, foreman-vmware 3.18.0.19-1.el9sat, +7 more
    fixed: vendor fix RHSA-2026:100120
  • Red Hat Satellite 6.16 for RHEL 8 candlepin 4.4.26-2.el8sat, satellite 6.16.15-1.el8sat, python-pyjwt 2.15.1-1.el8pc, rubygem-puma 6.4.3-2.el8sat, rubygem-crass 1.0.8-1.el8sat, python-pulp-rpm 3.26.9-1.el8pc, +17 more Red Hat Satellite 6.16 for RHEL 9 candlepin 4.4.26-2.el9sat, satellite 6.16.15-1.el9sat, python-pyjwt 2.15.1-1.el9pc, rubygem-puma 6.4.3-2.el9sat, rubygem-crass 1.0.8-1.el9sat, python-pulp-rpm 3.26.9-1.el9pc, +17 more Red Hat Satellite 6.17 for RHEL 9 candlepin 4.4.26-2.el9sat, satellite 6.17.13-1.el9sat, python-pyjwt 2.15.1-1.el9pc, rubygem-puma 6.6.0-2.el9sat, rubygem-crass 1.0.8-1.el9sat, ansible-core 2.16.19-4.el9sat, +22 more Red Hat Satellite 6.18 for RHEL 9 candlepin 4.6.7-2.el9sat, satellite 6.18.11-1.el9sat, rubygem-puma 6.6.1-2.el9sat, rubygem-crass 1.0.8-1.el9sat, ansible-core 2.16.19-4.el9sat, ansible-test 2.16.19-4.el9sat, +15 more Red Hat Satellite 6.19 for RHEL 9 candlepin 4.7.7-2.el9sat, satellite 6.19.6-1.el9sat, createrepo_c 1.2.6-1.el9pc, rubygem-crass 1.0.8-1.el9sat, satellite-cli 6.19.6-1.el9sat, createrepo_c-libs 1.2.6-1.el9pc, +22 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
yesterday

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Red Hat Red Hat Satellite 6.16 for RHEL 8
  • Red Hat Red Hat Satellite 6.16 for RHEL 9
  • Red Hat Red Hat Satellite 6.17 for RHEL 9
  • Red Hat Red Hat Satellite 6.18 for RHEL 9
  • Red Hat Red Hat Satellite 6.19 for RHEL 9

Classification

Weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.