CVE-2026-48804

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-48804
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48804.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-48804
Aliases
Downstream
Related
Published
2026-08-11T19:17:53Z
Modified
2026-09-12T03:30:42Z
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
python-socketio: Binary attachment accumulation can cause denial of service
Details

python-socketio is a Python implementation of the Socket.IO realtime client and server. The python-socketio server stores binary EVENT and ACK messages in memory while it waits to receive their binary attachments. Once all the attachments are received, these messages are then processed. Prior to version 5.16.4, an attacker can submit a binary message and intentionally omit sending one or more of its attachments to cause the message along with the partial list of received attachments to stay in memory for a long time. Version 5.16.4 takes the following measures to address this issue: Binary packets are only accepted from authenticated clients and, when a client disconnects, the server checks if there is a partial binary message being held for the client and deletes it.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48804.json"
}
References

Affected packages

Git / github.com/miguelgrinberg/python-socketio

Affected ranges

Type
GIT
Repo
https://github.com/miguelgrinberg/python-socketio
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4bec3ef87bcfd6ab5b94cd3ac09d873283a6960e
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "5.16.4"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v.*
v.2.1.1
v0.*
v0.1.0
v0.2.0
v0.3.0
v0.4.0
v0.4.1
v0.5.0
v0.5.2
v0.6.1
v0.7.0
v0.8.0
v0.8.1
v0.8.2
v0.9.0
v0.9.1
v1.*
v1.0
v1.1
v1.2
v1.3
v1.4
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.9.0
v2.*
v2.0.0
v2.1.0
v2.1.1
v2.1.2
v3.*
v3.0.0
v3.0.1
v3.1.0
v3.1.1
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.1.0
v4.2.0
v4.2.1
v4.3.0
v4.3.1
v4.4.0
v4.5.0
v4.5.1
v4.6.0
v4.6.1
v5.*
v5.0.0
v5.0.1
v5.0.2
v5.0.3
v5.0.4
v5.1.0
v5.10.0
v5.11.0
v5.11.1
v5.11.2
v5.11.3
v5.11.4
v5.12.0
v5.12.1
v5.13.0
v5.14.0
v5.14.1
v5.14.2
v5.14.3
v5.15.0
v5.15.1
v5.16.0
v5.16.1
v5.16.2
v5.16.3
v5.2.0
v5.2.1
v5.3.0
v5.4.0
v5.4.1
v5.5.0
v5.5.1
v5.5.2
v5.6.0
v5.7.0
v5.7.1
v5.7.2
v5.8.0
v5.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48804.json"