{"id":"CVE-2026-61554","state":"PUBLISHED","title":"emp3r0r has an unauthenticated HTTP Polling DoS","description":"emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 4.2.5, the `http_poll` C2 transport accepts attacker-controlled HTTP polling sessions before CBOR `MsgAuth` authentication is completed. A remote unauthenticated attacker can create arbitrary polling sessions and send request bodies that are forwarded into the C2 dispatch path. This can consume server resources and trigger pre-auth C2 processing. Version 4.2.5 patches the issue.","publishedAt":"2026-09-15T20:48:05.156Z","updatedAt":"2026-09-16T17:59:54.763Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["jm33-m0 emp3r0r"],"affected":[{"vendor":"jm33-m0","product":"emp3r0r","versions":[{"version":"< 4.2.5","status":"affected"}]}],"references":["https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34","https://github.com/jm33-m0/emp3r0r/releases/tag/v4.2.5"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/61xxx/CVE-2026-61554.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-61554","state":"PUBLISHED","datePublished":"2026-09-15T20:48:05.156Z","dateUpdated":"2026-09-16T17:59:54.763Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-10T16:48:39.923Z"},"containers":{"cna":{"title":"emp3r0r has an unauthenticated HTTP Polling DoS","descriptions":[{"lang":"en","value":"emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 4.2.5, the `http_poll` C2 transport accepts attacker-controlled HTTP polling sessions before CBOR `MsgAuth` authentication is completed. A remote unauthenticated attacker can create arbitrary polling sessions and send request bodies that are forwarded into the C2 dispatch path. This can consume server resources and trigger pre-auth C2 processing. Version 4.2.5 patches the issue."}],"affected":[{"vendor":"jm33-m0","product":"emp3r0r","versions":[{"version":"< 4.2.5","status":"affected"}]}],"references":[{"url":"https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34","name":"https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/jm33-m0/emp3r0r/releases/tag/v4.2.5","name":"https://github.com/jm33-m0/emp3r0r/releases/tag/v4.2.5","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-15T20:48:05.156Z"},"source":{"advisory":"GHSA-4595-rvpx-4q34","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T17:59:27.422568Z","id":"CVE-2026-61554","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-16T17:59:54.763Z"}}]}}}