Deserialization in Trailofbits Fickling
CVE-2026-22609
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.001
Affected products
- Trailofbits Fickling — versions < 0.1.7
Weakness classification (CWE)
References
- github.com/trailofbits/fickling/security/advisories/GHSA-q5qq-mvfm-j35x (Exploit, Vendor Advisory)
- github.com/trailofbits/fickling/commit/29d5545e74b07766892c1f0461b801afccee4f91 (Patch)
- github.com/trailofbits/fickling/commit/9a2b3f89bd0598b528d62c10a64c1986fcb09f66 (Patch)
- github.com/trailofbits/fickling/commit/b793563e60a5e039c5837b09d7f4f6b92e6040d1 (Patch)
- github.com/trailofbits/fickling/commit/eb299b453342f1931c787bcb3bc33f3a03a173f9 (Patch)
- github.com/trailofbits/fickling/releases/tag/v0.1.7 (Release Notes)
Frequently asked questions
- What is CVE-2026-22609?
- CVE-2026-22609 is a high-severity vulnerability in Trailofbits Fickling, classified under Incomplete List of Disallowed Inputs. CVSS score: 7.8/10. Published 2026-01-10.
- How severe is CVE-2026-22609?
- High severity. CVSS v3 base score is 7.8 out of 10.