What’s Vulnerable › Vulnerabilities

CVE-2026-22609: Fickling has Static Analysis Bypass via Incomplete Dangerous Module Blocklist

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-10 · updated 2026-06-17
• Weakness: CWE-184

Description

Fickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, the unsafe_imports() method in Fickling's static analyzer fails to flag several high-risk Python modules that can be used for arbitrary code execution. Malicious pickles importing these modules will not be detected as unsafe, allowing attackers to bypass Fickling's primary static safety checks. This issue has been patched in version 0.1.7.

Affected products

• trailofbits fickling: before 0.1.7 — fixed in 0.1.7

How to fix

Upgrade to a fixed version: trailofbits fickling 0.1.7. Check the vendor advisory for mitigations.

References

• https://github.com/trailofbits/fickling/commit/29d5545e74b07766892c1f0461b801afccee4f91
• https://github.com/trailofbits/fickling/commit/9a2b3f89bd0598b528d62c10a64c1986fcb09f66
• https://github.com/trailofbits/fickling/commit/b793563e60a5e039c5837b09d7f4f6b92e6040d1
• https://github.com/trailofbits/fickling/commit/eb299b453342f1931c787bcb3bc33f3a03a173f9
• https://github.com/trailofbits/fickling/releases/tag/v0.1.7
• https://github.com/trailofbits/fickling/security/advisories/GHSA-q5qq-mvfm-j35x
• https://github.com/trailofbits/fickling/security/advisories/GHSA-q5qq-mvfm-j35x

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