What is CVE-2026-49841?

CVE-2026-49841 is a critical-severity vulnerability in Freeswitch, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-06-09.

How severe is CVE-2026-49841?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Freeswitch

CVE-2026-49841

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 hand…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freeswitch

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow
CWE-131 — Incorrect Calculation of Buffer Size

References

security-advisories@github.com (Release Notes)
security-advisories@github.com (Third Party Advisory)

Frequently asked questions

What is CVE-2026-49841?: CVE-2026-49841 is a critical-severity vulnerability in Freeswitch, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-06-09.
How severe is CVE-2026-49841?: Critical severity. CVSS v3 base score is 9.8 out of 10.