freeswitch
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- Application framework
- Total vulnerabilities (90 days)
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As of 10/24/2026, freeswitch recorded 0 security vulnerabilities in the last 90 days, of which 0 are rated High or Critical. None of these vulnerabilities is actively exploited (KEV) according to CISA's catalog. CyStack recommends that organizations and individual users apply patches as soon as possible.
CyStack does not yet have sufficient official-source data to identify the latest version of freeswitch and determine which vulnerabilities affect that version.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the organization.
CVE-2026-49848FreeSWITCH: Pre-authentication `userVariables` injection in `mod_verto`CVE-2026-49847FreeSWITCH: Stack overflow in bundled cJSON parser via deeply nested JSONCVE-2026-49843FreeSWITCH: Pre-authentication session eviction via attacker-chosen `sessid` in `mod_verto`CVE-2026-49842FreeSWITCH: Pre-authentication bandwidth amplification via `mod_verto` speed-test framesCVE-2026-49841FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read| Vulnerability | Exploitation status | Fix | Published | Severity |
|---|---|---|---|---|
CVE-2026-49848FreeSWITCH: Pre-authentication `userVariables` injection in `mod_verto` | Exploitation statusNot exploited | FixYes |
| SeverityMedium |
CVE-2026-49847FreeSWITCH: Stack overflow in bundled cJSON parser via deeply nested JSON | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityHigh |
|---|
CVE-2026-49843FreeSWITCH: Pre-authentication session eviction via attacker-chosen `sessid` in `mod_verto` | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityMedium |
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CVE-2026-49842FreeSWITCH: Pre-authentication bandwidth amplification via `mod_verto` speed-test frames | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityHigh |
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CVE-2026-49841FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityCritical |
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CVE-2026-49840FreeSWITCH: Pre-authentication heap buffer overflow in libesl `Content-Length` parsing | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityCritical |
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CVE-2026-49475FreeSWITCH: Out-of-bounds memory access in core STUN attribute parsing | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityHigh |
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CVE-2026-49472FreeSWITCH includes a vulnerable function, PREFIX(prologTok)() from libexpat | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityMedium |
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CVE-2026-45771Freeswitch Denial-of-Service in SIP PUBLISH Requests via XML Entity Expansion | Exploitation statusNot exploited | FixYes | Published06/09/2026 | SeverityHigh |
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CVE-2023-51443FreeSWITCH susceptible to Denial of Service via DTLS Hello packets during call initiation | Exploitation statusActively exploited | FixNo | Published12/27/2023 | SeverityHigh |
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