CVE-2026-3118

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{"acknowledgement": "Red Hat would like to thank Thibault Guittet for reporting this issue.", "bugzilla": {"description": "rhdh: GraphQL Injection Leading to Platform-Wide Denial of Service (DoS) in RH Developer Hub Orchestrator Plugin", "id": "2442273", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442273"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-89", "details": ["A security flaw was identified in the Orchestrator Plugin of Red Hat Developer Hub (Backstage). The issue occurs due to insufficient input validation in GraphQL query handling. An authenticated user can inject specially crafted input into API requests, which disrupts backend query processing. This results in the entire Backstage application crashing and restarting, leading to a platform-wide Denial of Service (DoS). As a result, legitimate users temporarily lose access to the platform."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, restrict network access to the Red Hat Developer Hub instance to trusted users and networks only. This limits the exposure of the vulnerable Orchestrator Plugin to unauthorized access."}, "name": "CVE-2026-3118", "package_state": [{"cpe": "cpe:/a:redhat:rhdh:1", "fix_state": "Under investigation", "package_name": "rhdh/rhdh-hub-rhel9", "product_name": "Red Hat Developer Hub"}], "public_date": "2026-02-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-3118\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-3118"], "statement": "This MODERATE impact vulnerability in the Orchestrator Plugin of Red Hat Developer Hub (Backstage) allows an authenticated attacker to cause a platform-wide Denial of Service. By injecting specially crafted input into GraphQL API requests, an attacker can disrupt backend query processing, leading to the application crashing and restarting. This issue temporarily prevents legitimate users from accessing the platform.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 98.0, "source": "matching"}]}, "original": {"product": "Red Hat Developer Hub", "source": "cna", "vendor": "Red Hat"}, "product": "developer_hub", "vendor": "redhat"}], "analysis": {"en": {"generated_at": "2026-04-16T16:13:51.603527+00:00", "value": {"mitigation_remediation": ["Restrict network access to the Red\u202fHat Developer Hub instance to trusted users and networks only.", "Monitor the platform for unexpected crashes or restart events that may indicate an attempt to exploit the GraphQL injection flaw.", "Review future Red\u202fHat releases for fixes that strengthen GraphQL input validation and plan to upgrade when available."], "summary": {"action": "Apply Workaround", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Red\u202fHat Developer Hub (Backstage). No specific product version information is provided in the public data, so all deployments of the Red\u202fHat Developer Hub that include the Orchestrator Plugin are potentially impacted.", "description_and_impact": "A flaw in the Orchestrator Plugin of Red\u202fHat Developer Hub allows an authenticated user to inject malicious input into GraphQL queries. Because the plugin performs insufficient input validation, the crafted request disrupts backend query processing, causing the entire Backstage application to crash and restart. As a result, legitimate users experience a platform\u2011wide denial of service for the duration of the restart cycle.", "risk_and_exploitability": "The CVSS Base score is 6.5, denoting a medium severity vulnerability, while the EPSS score is reported as less than 1\u202f%, indicating a very low probability of exploitation at present. The vulnerability is not listed in CISA\u2019s KEV catalog. Exploitation appears to require an attacker with valid credentials capable of accessing the GraphQL API; the attack pattern is based on authenticated exploitation. Although the exploit is not currently widespread, the impact of each successful attack is significant because it brings down the entire platform."}}}}, "created": "2026-02-26T13:18:09.509530+00:00", "updated": "2026-04-16T16:15:08.477699+00:00", "vendors": ["redhat", "redhat$PRODUCT$developer_hub"]}