libesl

FreeSWITCH Heap Buffer Overflow Bugs Expose Servers to Pre-Auth Attacks

FreeSWITCH heap buffer overflow CVE-2026-49841, CVE-2026-49840, mod_verto vulnerability

FreeSWITCH Heap Buffer Overflow Bugs Expose Servers to Pre-Auth Attacks

Do Son June 16, 2026

Two pre-auth FreeSWITCH heap buffer overflow bugs (CVE-2026-49841, CVE-2026-49840) hit mod_verto and libesl. Update to v1.11.1 to stay safe.

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