CVE-2026-89078
Double Free in GitLab
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Double Free in GitLab
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.
- Record
CVE-2026-89078- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Weakness
- CWE-415
- Updated
- 2026-11-02
EUVDEUVD-2026-85736
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.
- Record
EUVD-2026-85736- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9chr-4x58-948m
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.7, 19...
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.
- Record
GHSA-9chr-4x58-948m- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Weakness
- CWE-415
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-89078- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Weakness
- CWE-415
- Updated
- 2026-11-02
OSVALPINE-CVE-2026-89078
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.
- Record
ALPINE-CVE-2026-89078- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Updated
- 2026-11-02
OSVBELL-CVE-2026-89078
- Record
BELL-CVE-2026-89078- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Updated
- 2026-11-02
Show 4 moreShow less
OSV
Double Free in GitLab
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.
- Record
CVE-2026-89078- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Weakness
- CWE-415
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-89078
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.
- Record
DEBIAN-CVE-2026-89078- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - Updated
- 2026-11-07
OSVBIT-gitlab-2026-89078 No score
Double Free in GitLab
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.
- Record
BIT-gitlab-2026-89078- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:12252-1 No score
libruby4_0-4_0-4.0.9-1.1 on GA media
These are all security issues fixed in the libruby4_0-4_0-4.0.9-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:12252-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
rubyAlpine:v3.21 |
before 3.3.13-r0 | 3.3.13-r0 |
rubyAlpine:v3.22 |
before 3.4.12-r0 | 3.4.12-r0 |
rubyAlpine:v3.23 |
before 3.4.12-r0 | 3.4.12-r0 |
rubyAlpine:v3.24 |
before 3.4.12-r0 | 3.4.12-r0 |
rubyAlpaquita:23 |
3.1.2-r1 up to 3.3.13-r0 | 3.3.13-r0 |
rubyAlpaquita:25 |
3.4.4-r0 up to 3.4.12-r0 | 3.4.12-r0 |
rubyAlpaquita:stream |
3.1.2-r1 up to 3.4.12-r0 | 3.4.12-r0 |
gitlabBitnami |
19.2.0 up to 19.2.7, 19.3.0 up to 19.3.3, 19.4.0 up to 19.4.1 | 19.2.719.3.319.4.1 |
ruby3.1Debian:12 |
All versions, plus listed versions 3.1.2-73.1.2-7+deb12u13.1.2-7+hurd.13.1.2-83.1.2-8.1~exp13.1.2-8.33.1.2-8.43.1.2-8.5 |
None known |
ruby3.3Debian:13 |
before 3.3.13-0+deb13u1, plus listed versions 3.3.8-23.3.8-2.13.3.8-2.2 |
3.3.13-0+deb13u1 |
ruby3.3Debian:14 |
All versions, plus listed versions 3.3.8-23.3.8-2.13.3.8-2.2 |
None known |
ruby4.0openSUSE:Tumbleweed From an advisory covering 2 CVEs |
before 4.0.9-1.1 | 4.0.9-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | OSV | |
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-89078 is a critical vulnerability (CVSS 9.9) in Gitlab, published September 23, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.52%, the 44th percentile. Fixed in ruby 3.3.13-r0.
References
gitlab.com/gitlab-org/gitlab/-/work_items/628577
hackerone.com/reports/4019059
docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released
ruby-lang.org/en/news/2026/10/23/regexp-fixes-for-gitlab-cves
nvd.nist.gov/vuln/detail/CVE-2026-89078
github.com/advisories/GHSA-9chr-4x58-948m