Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-87719

Severity CVSS v4.0:
Pending analysis
Type:
CWE-502 Deserialization of Untrusted Dat
Publication date:
12/09/2026
Last modified:
28/09/2026

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 18.11.12, 19.0 before 19.0.9, 19.1 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could allow an authenticated user with Duo Chat access to obtain Advanced Search instance configurations and sensitive credentials using a specially crafted GraphQL subscription argument to bypass serialization and perform server object lookup.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.90 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.90
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* 18.3.0 (including) 18.11.12 (excluding)
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* 19.0.0 (including) 19.0.9 (excluding)
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* 19.1.0 (including) 19.1.8 (excluding)
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* 19.2.0 (including) 19.2.6 (excluding)
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* 19.3.0 (including) 19.3.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools