Skip to content
Fencer Vulns
critical 9.9

CVE-2026-89078 in the critical feed json

Double Free in GitLab

published 2026-09-23 46 d ago modified 2026-10-31 9 d ago also BIT-gitlab-2026-89078 , EUVD-2026-85736

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary code on the GitLab server due to a double free issue when parsing a specially crafted regular expression in a CI/CD configuration.

Patch / fix

  • bitnami gitlab 19.2.7, 19.3.3, 19.4.1
  • GitLab GitLab 19.2.7, 19.3.3, 19.4.1
  • ruby3.3 Debian 13 3.3.13-0+deb13u1

debian advisories DEBIAN-CVE-2026-89078

  • ruby4.0 openSUSE Tumbleweed 4.0.9-1.1

opensuse advisories openSUSE-SU-2026:12252-1

  • ruby Alpine 3.21 3.3.13-r0
  • ruby Alpine 3.24, Alpine 3.23, Alpine 3.22 3.4.12-r0

alpine advisories ALPINE-CVE-2026-89078

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-89078 updated cvss 9.8

ruby: double free issue in regular expression parser

  • Red Hat Enterprise Linux 6 ruby, ruby-ri, ruby-irb, ruby-libs, ruby-rdoc, ruby-tcltk Red Hat Enterprise Linux 7 ruby, ruby-irb, rubygems, ruby-libs, ruby-tcltk, rubygem-json, +6 more Red Hat Enterprise Linux 8 ruby, ruby-irb, rubygems, ruby-libs, rubygem-pg, rubygem-irb, +25 more Red Hat Enterprise Linux 9 ruby, rubygems, ruby-libs, rubygem-irb, rubygem-rbs, rubygem-rss, +13 more Red Hat Enterprise Linux 10 ruby
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) ruby 3.0.7-170.el9_8, ruby-libs 3.0.7-170.el9_8, rubygems 3.2.33-170.el9_8, rubygem-irb 1.3.5-170.el9_8, rubygem-rbs 1.4.0-170.el9_8, rubygem-rss 0.2.9-170.el9_8, +13 more Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) ruby-doc 3.0.7-170.el9_8
    fixed: vendor fix RHSA-2026:96067
  • Red Hat Hardened Images ruby4.0 4.0.9-41.hum1, ruby3.3 3.3.13-23.8.hum1, ruby3.4 3.4.12-33.1.hum1, ruby4.0-libs 4.0.9-41.hum1, ruby3.3-libs 3.3.13-23.8.hum1, ruby3.4-libs 3.4.12-33.1.hum1, +6 more
    fixed: vendor fix RHSA-2026:88880
  • Red Hat Satellite 6.16 for RHEL 8 python-pyyaml 6.0.1-1.el8pc, openvox-agent 8.32.0-1.el8sat, python3.11-pyyaml 6.0.1-1.el8pc Red Hat Satellite 6.16 for RHEL 9 python-pyyaml 6.0.1-1.el9pc, openvox-agent 8.32.0-1.el9sat, python3.11-pyyaml 6.0.1-1.el9pc
    fixed: vendor fix RHSA-2026:95655
  • Red Hat Satellite 6.17 for RHEL 9 openvox-agent 8.32.0-1.el9sat
    fixed: vendor fix RHSA-2026:95656
  • Red Hat Satellite 6.18 for RHEL 9 openvox-agent 8.32.0-1.el9sat
    fixed: vendor fix RHSA-2026:95657
  • Red Hat Satellite 6.19 for RHEL 9 openvox-agent 8.32.0-1.el9sat
    fixed: vendor fix RHSA-2026:95652
  • Red Hat Enterprise Linux 9 ruby, rubygems, ruby-libs, rubygem-irb, rubygem-rbs, rubygem-rss, +13 more Red Hat Enterprise Linux 10 ruby4.0 Red Hat Hardened Images hi/ruby, rubygem4.0-rss 0.3.2-41.hum1, rubygem4.0-irb 1.16.0-41.hum1, rubygem4.0-racc 1.8.1-41.hum1, rubygem4.0-rbs 3.10.0-41.hum1, rubygem4.0-rdoc 7.0.4-41.hum1, +46 more
    not affected: vulnerable code not present
show 2 more
  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    not affected: component not present
  • Red Hat Satellite 6.16 for RHEL 8 python-nh3 0.3.0-2.el8pc, python-brotli 1.2.1-1.el8pc, python-django 4.2.30-2.el8pc, python-pillow 13.0.0-1.el8pc, python-urllib3 2.8.0-1.el8pc, python3.11-nh3 0.3.0-2.el8pc, +11 more Red Hat Satellite 6.16 for RHEL 9 python-nh3 0.3.0-2.el9pc, python-brotli 1.2.1-1.el9pc, python-django 4.2.30-2.el9pc, python-pillow 13.0.0-1.el9pc, python-urllib3 2.8.0-1.el9pc, python3.11-nh3 0.3.0-2.el9pc, +11 more Red Hat Satellite 6.17 for RHEL 9 python-brotli 1.2.1-1.el9pc, python-django 4.2.30-2.el9pc, python-pillow 13.0.0-1.el9pc, python-urllib3 2.8.0-1.el9pc, openvox-server 8.18.0-1.el9sat, python-gitpython 3.2.1-1.el9pc, +7 more Red Hat Satellite 6.18 for RHEL 9 openvox-server 8.18.0-1.el9sat, python3.12-brotli 1.2.1-1.el9pc, python3.12-django 4.2.30-3.el9pc, python3.12-pillow 13.0.0-1.el9pc, python3.12-urllib3 2.8.0-1.el9pc, python3.12-gitpython 3.2.1-1.el9pc, +2 more Red Hat Satellite 6.19 for RHEL 9 openvox-server 8.18.0-1.el9sat
    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
total
Assessed
46 d ago

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/4019059 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
OSV 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=19.2.0, <19.2.7
>=19.3.0, <19.3.3
>=19.4.0, <19.4.1
19.2.7
19.3.3
19.4.1

Affected products

  • GitLab GitLab

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.