{"id":"CVE-2026-49842","state":"PUBLISHED","title":"FreeSWITCH: Pre-authentication bandwidth amplification via `mod_verto` speed-test frames","description":"FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's WebSocket frame loop intercepts a #-prefixed speed-test protocol (#SPU / #SPB / #SPE) before any authentication check. The declared payload size in #SPU was parsed with atoi() and only rejected non-positive values, so an unauthenticated peer could request up to INT_MAX bytes. The server then wrote roughly size * 10 bytes back during the download phase, on the order of 20 GB per request, yielding strong outbound bandwidth amplification from a short request. This issue has been patched in version 1.11.1.","publishedAt":"2026-06-09T16:02:58.096Z","updatedAt":"2026-06-09T18:39:33.710Z","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":["signalwire freeswitch"],"affected":[{"vendor":"signalwire","product":"freeswitch","versions":[{"version":"< 1.11.1","status":"affected"}]}],"references":["https://github.com/signalwire/freeswitch/security/advisories/GHSA-p3gx-p2w7-wp35","https://github.com/signalwire/freeswitch/releases/tag/v1.11.1"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49842.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49842","state":"PUBLISHED","datePublished":"2026-06-09T16:02:58.096Z","dateUpdated":"2026-06-09T18:39:33.710Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-01T18:50:36.057Z"},"containers":{"cna":{"title":"FreeSWITCH: Pre-authentication bandwidth amplification via `mod_verto` speed-test frames","descriptions":[{"lang":"en","value":"FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's WebSocket frame loop intercepts a #-prefixed speed-test protocol (#SPU / #SPB / #SPE) before any authentication check. The declared payload size in #SPU was parsed with atoi() and only rejected non-positive values, so an unauthenticated peer could request up to INT_MAX bytes. The server then wrote roughly size * 10 bytes back during the download phase, on the order of 20 GB per request, yielding strong outbound bandwidth amplification from a short request. This issue has been patched in version 1.11.1."}],"affected":[{"vendor":"signalwire","product":"freeswitch","versions":[{"version":"< 1.11.1","status":"affected"}]}],"references":[{"url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-p3gx-p2w7-wp35","name":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-p3gx-p2w7-wp35","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.1","name":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.1","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":"2026-06-09T16:02:58.096Z"},"source":{"advisory":"GHSA-p3gx-p2w7-wp35","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-09T18:05:28.761050Z","id":"CVE-2026-49842","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-09T18:39:33.710Z"}}]}}}