CVE-2026-49840

Katalog CVE

CVSS 9.1 · Critical EPSS 0,49%

Kerentanan Improper Input Validation pada freeswitch. Skor CVSS 3.1 9.1 (Critical) menurut github.com.

Deskripsi (NVD)

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, esl_recv_event() parses Content-Length with atol() and passes the result straight to malloc(len + 1) with no sign or magnitude check. A malicious or man-in-the-middle ESL peer can send a frame with a negative Content-Length to corrupt the heap of, or crash, any process linked against libesl, before the client has authenticated to that peer. This issue has been patched in version 1.11.1.

Rincian

Terbit di NVD

9 Juni 2026

Terakhir diubah

23 Juli 2026

Status NVD

Analyzed

CVSS 3.1

9.1 (Critical), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation
CWE-122: Heap-based Buffer Overflow
CWE-195: Signed to Unsigned Conversion Error
CWE-787: Out-of-bounds Write

EPSS (30 hari)

0,49% peluang dieksploitasi; lebih tinggi dari 40,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/signalwire/freeswitch/security/advisories/GHSA-g597-9fgg-ghg9 advisory pihak ketiga
• https://github.com/signalwire/freeswitch/releases/tag/v1.11.1 release notes