CVE-2026-59724

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Source
https://cve.org/CVERecord?id=CVE-2026-59724
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59724.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-59724
Aliases
  • GHSA-gr94-w7qr-f4j3
Published
2026-07-08T15:35:39.813Z
Modified
2026-07-15T01:49:20.612839733Z
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
Socket.IO: Engine.IO WebTransport SID DoS
Details

Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as proto through an inherited property of the clients object during WebTransport upgrade handling, causing a TypeError and denial of service. This issue is fixed in version 6.6.7.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59724.json",
    "cwe_ids": [
        "CWE-20"
    ]
}
References

Affected packages

Git / github.com/socketio/socket.io

Affected ranges

Type
GIT
Repo
https://github.com/socketio/socket.io
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
439a8f669c6788b512dd76011c4476830d67515b
Fixed
1fa1f46cd420ac5b57bb4c04c959b58f3c79158c
Database specific 
{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "6.5.0"
        },
        {
            "fixed": "6.6.7"
        }
    ]
}

Affected versions

0.*
0.7.0
0.7.1
0.7.2
0.7.3
0.7.4
0.7.5
0.7.6
0.7.7
0.7.8
0.7.9
0.8.0
0.8.1
0.8.2
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
0.9.0
0.9.1
0.9.1-1
0.9.10
0.9.2
0.9.3
0.9.4
0.9.5
0.9.7
0.9.8
0.9.9
1.*
1.0.0
1.0.0-pre
1.0.0-pre2
1.0.0-pre3
1.0.0-pre4
1.0.0-pre5
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.0.6
1.1.0
1.2.0
1.2.1
1.3.0
1.3.1
1.3.2
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.5.0
1.5.1
1.6.0
1.7.0
1.7.1
1.7.2
2.*
2.0.0
2.0.1
2.0.2
2.0.3
2.0.4
2.1.0
2.1.1
2.2.0
2.3.0
3.*
3.0.0
3.0.0-rc1
3.0.0-rc2
3.0.0-rc3
3.0.0-rc4
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.1.0
3.1.1
3.1.2
4.*
4.0.0
4.0.1
4.0.2
4.1.0
4.1.1
4.1.2
4.1.3
4.2.0
4.3.0
4.3.1
4.3.2
4.4.0
4.4.1
4.5.0
4.5.1
4.5.2
4.5.3
4.5.4
4.6.0
4.6.0-alpha1
4.6.1
4.6.2
4.7.0
4.7.1
4.7.2
4.7.3
4.7.4
4.7.5
@socket.*
@socket.io/cluster-adapter@0.3.0
@socket.io/cluster-engine@0.1.0
@socket.io/postgres-emitter@0.1.1
@socket.io/redis-streams-emitter@0.1.0
@socket.io/redis-streams-emitter@0.1.1
engine.*
engine.io-client@6.6.1
engine.io-client@6.6.2
engine.io-client@6.6.3
engine.io-client@6.6.4
engine.io-parser@5.2.3
engine.io@6.6.1
engine.io@6.6.2
engine.io@6.6.3
engine.io@6.6.4
engine.io@6.6.5
engine.io@6.6.6
socket.*
socket.io-adapter@2.5.6
socket.io-client@4.8.0
socket.io-client@4.8.1
socket.io-client@4.8.2
socket.io-client@4.8.3
socket.io-parser@4.2.5
socket.io@4.7.5
socket.io@4.8.0
socket.io@4.8.1
socket.io@4.8.2
socket.io@4.8.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59724.json"