CVE-2025-61765

Code execution via untrusted pickle deserialization

Published Oct 6, 2025 · Updated Oct 6, 2025

Remote code execution in python-socketio before 5.14.0 allows attackers to run arbitrary Python code through crafted queue messages. A server-side message-queue manager passes received inter-server data directly to pickle.loads(), allowing a payload's reduce method to execute during deserialization. Exploitation requires prior access to the deployment's internal message queue; single-server deployments and multi-server deployments with a secure queue are not affected.

CVSS severity6.4
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in python-socketio before 5.14.0 allows attackers to run arbitrary Python code through crafted queue messages. A server-side message-queue manager passes received inter-server data directly to pickle.loads(), allowing a payload's reduce method to execute during deserialization. Exploitation requires prior access to the deployment's internal message queue; single-server deployments and multi-server deployments with a secure queue are not affected.

The record

CVE
CVE-2025-61765
Published
Oct 6, 2025
Updated
Oct 6, 2025
Vendor
Miguel Grinberg
Product
python-socketio
Classifications
CWE-502, T1059.006
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.8.0, < 5.14.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

Miguel Grinberg · python-socketioversion=>= 0.8.0, < 5.14.0

Published CVSS scores

6.4Miguel Grinberg GitHub Security AdvisoryCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1059.006Command and Scripting Interpreter: Python

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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