{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-45771: Freeswitch Denial-of-Service in SIP PUBLISH Requests via XML Entity Expansion","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-45771","status":"final","version":"1","initial_release_date":"2026-06-09T15:51:49.484Z","current_release_date":"2026-06-09T18:24:19.380Z","revision_history":[{"date":"2026-06-09T15:51:49.484Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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 1.11.0, FreeSWITCH's bundled XML parser expands nested <!ENTITY> declarations without a depth or count bound, so a small DTD can describe a body that expands exponentially (\"billion laughs\"). The PIDF body of a SIP PUBLISH is fed to this parser before any digest check, letting an unauthenticated network attacker force unbounded CPU and memory consumption with a single request. This issue has been patched in version 1.11.0.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-45771 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-45771"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-45771"},{"category":"external","summary":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-5vjg-pv56-vg4c","url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-5vjg-pv56-vg4c"},{"category":"external","summary":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.0","url":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.0"}]},"product_tree":{"branches":[{"category":"vendor","name":"signalwire","branches":[{"category":"product_name","name":"freeswitch","branches":[{"category":"product_version","name":"< 1.11.0","product":{"name":"signalwire freeswitch < 1.11.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:signalwire:freeswitch:\\<_1.11.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-45771","title":"Freeswitch Denial-of-Service in SIP PUBLISH Requests via XML Entity Expansion","notes":[{"category":"description","text":"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 1.11.0, FreeSWITCH's bundled XML parser expands nested <!ENTITY> declarations without a depth or count bound, so a small DTD can describe a body that expands exponentially (\"billion laughs\"). The PIDF body of a SIP PUBLISH is fed to this parser before any digest check, letting an unauthenticated network attacker force unbounded CPU and memory consumption with a single request. This issue has been patched in version 1.11.0.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}