GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under… (CVE-2026-87719)
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 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.
AI Analysis
Technical Summary
GitLab EE versions 18.3 up to but not including 19.1.8, 19.2 up to but not including 19.2.6, and 19.3 up to but not including 19.3.2 contain a vulnerability where an authenticated user with Duo Chat access can exploit a flaw in GraphQL subscription argument handling to bypass serialization protections and perform server object lookups. This results in unauthorized access to Advanced Search instance configurations and sensitive credentials. The vulnerability is tracked as CVE-2026-87719 and has a CVSS v3.1 score of 9.9, indicating critical severity.
Potential Impact
An attacker with valid authentication and Duo Chat access can retrieve sensitive configuration data and credentials from the Advanced Search feature by exploiting this vulnerability. This compromises confidentiality, integrity, and availability of the affected GitLab instances.
Mitigation Recommendations
GitLab has remediated this issue in versions 19.1.8, 19.2.6, and 19.3.2. Users should upgrade affected GitLab EE instances to these or later versions to mitigate the vulnerability. No information about alternative mitigations or temporary fixes is provided.
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under… (CVE-2026-87719)
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 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.
CVSS v3.1
Score 9.9critical
Affected software
pkg:gem/gitlabRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
GitLab EE versions 18.3 up to but not including 19.1.8, 19.2 up to but not including 19.2.6, and 19.3 up to but not including 19.3.2 contain a vulnerability where an authenticated user with Duo Chat access can exploit a flaw in GraphQL subscription argument handling to bypass serialization protections and perform server object lookups. This results in unauthorized access to Advanced Search instance configurations and sensitive credentials. The vulnerability is tracked as CVE-2026-87719 and has a CVSS v3.1 score of 9.9, indicating critical severity.
Potential Impact
An attacker with valid authentication and Duo Chat access can retrieve sensitive configuration data and credentials from the Advanced Search feature by exploiting this vulnerability. This compromises confidentiality, integrity, and availability of the affected GitLab instances.
Mitigation Recommendations
GitLab has remediated this issue in versions 19.1.8, 19.2.6, and 19.3.2. Users should upgrade affected GitLab EE instances to these or later versions to mitigate the vulnerability. No information about alternative mitigations or temporary fixes is provided.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-prp4-5w2g-8v2c
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-87719"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6aa5f00855bf5e2cf5ef8167
Added to database: 09/13/2026, 00:36:24 UTC
Last enriched: 09/13/2026, 00:40:36 UTC
Last updated: 09/13/2026, 03:04:17 UTC
Views: 6
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