{"id":"CVE-2026-49841","state":"PUBLISHED","title":"FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read","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, the mod_verto HTTP request handler allocates a fixed 2 MiB buffer for a POST application/x-www-form-urlencoded body but accepts Content-Length up to just under 10 MiB. The body-read loop is bounded by Content-Length rather than the buffer size, producing an attacker-controlled heap overflow of up to ~8 MiB -- before the HTTP basic-auth check runs. This issue has been patched in version 1.11.1.","publishedAt":"2026-06-09T16:02:24.116Z","updatedAt":"2026-06-11T03:55:21.275Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-wfrq-qvg2-f88f","https://github.com/signalwire/freeswitch/releases/tag/v1.11.1"],"weaknesses":["CWE-122","CWE-131"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49841.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49841","state":"PUBLISHED","datePublished":"2026-06-09T16:02:24.116Z","dateUpdated":"2026-06-11T03:55:21.275Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-01T18:50:36.057Z"},"containers":{"cna":{"title":"FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read","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, the mod_verto HTTP request handler allocates a fixed 2 MiB buffer for a POST application/x-www-form-urlencoded body but accepts Content-Length up to just under 10 MiB. The body-read loop is bounded by Content-Length rather than the buffer size, producing an attacker-controlled heap overflow of up to ~8 MiB -- before the HTTP basic-auth check runs. 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-wfrq-qvg2-f88f","name":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-wfrq-qvg2-f88f","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":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","lang":"en","description":"CWE-122: Heap-based Buffer Overflow","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-131","lang":"en","description":"CWE-131: Incorrect Calculation of Buffer Size","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-09T16:02:24.116Z"},"source":{"advisory":"GHSA-wfrq-qvg2-f88f","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-10T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-49841"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-11T03:55:21.275Z"}}]}}}