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Vulnerability · Published Sep 23, 2026 · Assigned by GitLab

CVE-2026-93577Integer Overflow or Wraparound in GitLab

Critical 9.9

In plain English

A critical-severity integer overflow in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)0.6%top 49.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 an integer overflow issue when compiling a specially crafted regular expression in a CI/CD configuration.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.21ruby3.3.13-r0ALPINE-CVE-2026-93577
Alpine:v3.22ruby3.4.12-r0ALPINE-CVE-2026-93577
Alpine:v3.23ruby3.4.12-r0ALPINE-CVE-2026-93577
Alpine:v3.24ruby3.4.12-r0ALPINE-CVE-2026-93577
Debian:12ruby3.1no fix listedDEBIAN-CVE-2026-93577
Debian:13ruby3.3no fix listedDEBIAN-CVE-2026-93577
Debian:14ruby3.3no fix listedDEBIAN-CVE-2026-93577

Affected products (as reported)

VendorProductVersions
GitLab GitLab 19.2 – before 19.2.719.3 – before 19.3.319.4 – before 19.4.1

Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References