# CVE-2026-49841

## Summary

- **CVE ID:** CVE-2026-49841
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-122, CWE-131
- **Published:** Jun 9, 2026
- **Last Modified:** Jun 11, 2026

## 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.

## Affected Products

- signalwire — freeswitch (< 1.11.1)

## References

- [CNA](https://github.com/signalwire/freeswitch/security/advisories/GHSA-wfrq-qvg2-f88f)
- [CNA](https://github.com/signalwire/freeswitch/releases/tag/v1.11.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 32.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._