---
title: "CVE-2026-16760: Trail of Bits fickling - Insecure Deserialization"
description: "Trail of Bits fickling <= 0.1.12 contains a remote code execution caused by trusting callable safety based on module origin in _process_import(), letting attackers execute arbitrary code via pickle payloads, exploit requires deserialization of crafted pickle data."
url: https://panop.io/threat-heartbeat/CVE-2026-16760/
---

# CVE-2026-16760 Trail of Bits fickling - Insecure Deserialization

Trail of Bits fickling <= 0.1.12 contains a remote code execution caused by trusting callable safety based on module origin in \_process\_import(), letting attackers execute arbitrary code via pickle payloads, exploit requires deserialization of crafted pickle data.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.46% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-16760)

## Details

Type

Insecure Deserialization

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-502](https://cwe.mitre.org/data/definitions/502.html)

## Vendor fix

Update to a version after 0.1.12 where UNSAFE\_IMPORTS denylist is updated and module-origin trust root cause is fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-16760](https://nvd.nist.gov/vuln/detail/CVE-2026-16760)
- [https://pypi.org/project/fickling/0.1.12/](https://pypi.org/project/fickling/0.1.12/)
- [https://bombadil.systems/advisories.html](https://bombadil.systems/advisories.html)
- [https://github.com/trailofbits/fickling](https://github.com/trailofbits/fickling)
- [https://github.com/trailofbits/fickling/commit/d011709](https://github.com/trailofbits/fickling/commit/d011709)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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