CVE-2026-15529Public exploitNetwork attack vector

Code execution via pre-validation model deserialization

Published Jul 13, 2026 · Updated Jul 13, 2026

Unsafe deserialization in Yue Zhao PyOD 3.5.0 through 3.6.1 allows attackers to execute code through an untrusted model artifact. pyod.utils.persistence.load calls joblib.load before envelope, schema, dependency-version, or strict-mode checks, so pickle reducers run first. Execution requires an application to load an attacker-controlled or untrusted artifact and occurs with the loading Python process's privileges.

CVSS severity5.3
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unsafe deserialization in Yue Zhao PyOD 3.5.0 through 3.6.1 allows attackers to execute code through an untrusted model artifact. pyod.utils.persistence.load calls joblib.load before envelope, schema, dependency-version, or strict-mode checks, so pickle reducers run first. Execution requires an application to load an attacker-controlled or untrusted artifact and occurs with the loading Python process's privileges.

The record

CVE
CVE-2026-15529
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
Yue Zhao
Product
PyOD
Classifications
CWE-20, CWE-502, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.5.0
  2. Affected versionversion=3.5.1
  3. Affected versionversion=3.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Yue Zhao · PyODversion=3.5.0; version=3.5.1; version=3.5.2

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-502Deserialization of Untrusted Data
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo