CVE-2026-22609
Trailofbits Fickling insecure deserialization
- Published10 Jan 2026
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.
CVSS 3.1 breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HAffected products
Remediation
- 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/security/advisories/GHSA-q5qq-mvfm-j35x
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
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2026-22609 being actively exploited?
CVE-2026-22609 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.63%.
How severe is CVE-2026-22609?
CVE-2026-22609 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.63% probability of exploitation.
Which products are affected by CVE-2026-22609?
Affected products include Trailofbits Fickling.
How do I fix CVE-2026-22609?
Upgrade affected software to a fixed version, for example Trailofbits Fickling 0.1.7 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-22609 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.