https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-03T08:37:14.857192+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2026-22606 CVE-2026-22606 — Fickling has a bypass via runpy.run_path() and runpy.run_module() 2026-10-03T08:37:14.888851+00:00

Affected: trailofbits fickling

Fickling is a Python pickling decompiler and static analyzer. Fickling versions up to and including 0.1.6 do not treat Python’s runpy module as unsafe. Because of this, a malicious pickle that uses runpy.run_path() or runpy.run_module() is classified as SUSPICIOUS instead of OVERTLY_MALICIOUS. If a user relies on Fickling’s output to decide whether a pickle is safe to deserialize, this misclassification can lead them to execute attacker-controlled code on their system. This affects any workflow or product that uses Fickling as a security gate for pickle deserialization. This issue has been patched in version 0.1.7.

 https://cve.radiocsirt.org/vuln/ghsa-wfq2-52f7-7qvj GHSA-wfq2-52f7-7qvj — Fickling has a bypass via runpy.run_path() and runpy.run_module() 2026-10-03T08:37:14.888919+00:00

Affected: PyPI: fickling

# Fickling's assessment

`runpy` was added to the list of unsafe imports (https://github.com/trailofbits/fickling/commit/9a2b3f89bd0598b528d62c10a64c1986fcb09f66).

# Original report

### Summary Fickling versions up to and including 0.1.6 do not treat Python’s runpy module as unsafe. Because of this, a malicious pickle that uses runpy.run_path() or runpy.run_module() is classified as SUSPICIOUS instead of OVERTLY_MALICIOUS.

If a user relies on Fickling’s output to decide whether a pickle is safe to deserialize, this misclassification can lead them to execute attacker-controlled code on their system.

This affects any workflow or product that uses Fickling as a security gate for pickle deserialization.

### Details The `runpy` module is missing from fickling's block list of unsafe module imports in `fickling/analysis.py`. This is the same root cause as CVE-2025-67748 (pty) and CVE-2025-67747 (marshal/types).

Incriminated source code: - File: `fickling/analysis.py` - Class: `UnsafeImports` - Issue: The blocklist does not include `runpy`, `runpy.run_path`, `runpy.run_module`, or `runpy._run_code`

Reference to similar fix: - PR #187 added `pty` to the blocklist to fix CVE-2025-67748 - PR #108 documented the blocklist approach - The same fix pattern should be applied for `runpy`

How the bypass works: 1. Attacker creates a pickle using `runpy.run_path()` in `__reduce__` 2. Fickling's `UnsafeImports` analysis does not flag `runpy` as dangerous 3. Only the `UnusedVariables` he…