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CVE-2026-49840

🗓️ 09 Jun 2026 16:00:56Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 27 Views

FreeSWITCH pre-auth heap overflow in libesl parsing allows negative length, fixed in 1.11.1.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
AlpineLinux
CVE-2026-49840
9 Jun 202616:00
alpinelinux
Circl
CVE-2026-49840
10 Jun 202616:37
circl
CNNVD
FreeSWITCH 输入验证错误漏洞
9 Jun 202600:00
cnnvd
Cvelist
CVE-2026-49840 FreeSWITCH: Pre-authentication heap buffer overflow in libesl `Content-Length` parsing
9 Jun 202616:00
cvelist
EUVD
EUVD-2026-35471
9 Jun 202616:00
euvd
NVD
CVE-2026-49840
9 Jun 202617:17
nvd
Positive Technologies
PT-2026-47847
9 Jun 202600:00
ptsecurity
RedhatCVE
CVE-2026-49840
10 Jun 202621:02
redhatcve
Vulnrichment
CVE-2026-49840 FreeSWITCH: Pre-authentication heap buffer overflow in libesl `Content-Length` parsing
9 Jun 202616:00
vulnrichment
NVD
Vulners
Node
[
  {
    "vendor": "signalwire",
    "product": "freeswitch",
    "versions": [
      {
        "version": "< 1.11.1",
        "status": "affected"
      }
    ]
  }
]

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17 Jun 2026 10:55Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.19.1
EPSS0.0031
SSVC
27