CVE-2026-49842

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Source
https://cve.org/CVERecord?id=CVE-2026-49842
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49842.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49842
Aliases
  • GHSA-p3gx-p2w7-wp35
Published
2026-06-09T16:02:58Z
Modified
2026-10-28T02:31:00Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
FreeSWITCH: Pre-authentication bandwidth amplification via `mod_verto` speed-test frames
Details

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, mod_verto's WebSocket frame loop intercepts a #-prefixed speed-test protocol (#SPU / #SPB / #SPE) before any authentication check. The declared payload size in #SPU was parsed with atoi() and only rejected non-positive values, so an unauthenticated peer could request up to INT_MAX bytes. The server then wrote roughly size * 10 bytes back during the download phase, on the order of 20 GB per request, yielding strong outbound bandwidth amplification from a short request. This issue has been patched in version 1.11.1.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-400"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49842.json"
}
References

Affected packages

Git / github.com/signalwire/freeswitch

Affected ranges

Type
GIT
Repo
https://github.com/signalwire/freeswitch
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c2c59645f6911a76589e5008c4d73349ded44b65
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "1.11.1"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "original_tag":  "v1.11.1",
            "range":  [
                {
                    "fixed":  "c2c59645f6911a76589e5008c4d73349ded44b65"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "cpe":  "cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "1.11.1"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}

Affected versions

Other
git2svn-syncpoint-master
v.*
v.1.3.12
v.15.9
v0.*
v0.0.1
v1.*
v1.10.0
v1.10.1
v1.10.10
v1.10.11
v1.10.12
v1.10.2
v1.10.3
v1.10.4
v1.10.5
v1.10.6
v1.10.7
v1.10.8
v1.10.9
v1.11.0
v1.2-rc1
v1.2-rc2
v1.3.0
v1.3.1
v1.3.10
v1.3.11
v1.3.12
v1.3.13
v1.3.14
v1.3.15
v1.3.16
v1.3.17-final
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.3.7
v1.3.8
v1.3.9
v1.5.0
v1.5.1
v1.5.10
v1.5.12
v1.5.13
v1.5.14
v1.5.2
v1.5.5
v1.5.8
v1.5.final
v1.6.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49842.json"