Out-of-bounds Read in Freeswitch
CVE-2026-49475
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, a STUN packet whose declared attribute length is shorter than the structure the parser casts to causes the parser to read and write past the end of the attribute, producing an out-of-bounds memory access on the per-leg media buffer. This issue has been patched in version 1.11.0.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Freeswitch
- Signalwire Freeswitch — versions < 1.11.0
Weakness classification (CWE)
References
- github.com/signalwire/freeswitch/releases/tag/v1.11.0 (Release Notes)
- github.com/signalwire/freeswitch/security/advisories/GHSA-9j6h-hc95-q926 (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-49475?
- CVE-2026-49475 is a high-severity vulnerability in Freeswitch, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-06-09.
- How severe is CVE-2026-49475?
- High severity. CVSS v3 base score is 7.5 out of 10.