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CVE-2026-87719

Deserialization of Untrusted Data in GitLab

CVSS 3.1 9.9 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-87719

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-87719

Published

GitLab

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "cpes": [
                        "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "product": "GitLab",
                    "repo": "git://[email protected]:gitlab-org/gitlab.git",
                    "vendor": "GitLab",
                    "versions": [
                        {
                            "lessThan": "18.11.12",
                            "status": "affected",
                            "version": "18.3",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "19.0.9",
                            "status": "affected",
                            "version": "19.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "19.1.8",
                            "status": "affected",
                            "version": "19.1",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "19.2.6",
                            "status": "affected",
                            "version": "19.2",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "19.3.2",
                            "status": "affected",
                            "version": "19.3",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON