What is CVE-2026-22608?

CVE-2026-22608 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-2026-22608?

High severity. CVSS v3 base score is 7.8 out of 10.

Deserialization in Trailofbits Fickling

CVE-2026-22608

Fickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, both ctypes and pydoc modules aren't explicitly blocked. Even other existing pickle scanning tools (like picklescan) do not block pydoc.locate. Chaining these two together can achieve RCE while the scanner still reports the file as LIKELY_SAFE. This issue has been patched in version 0.1.7.

Published 2026-01-10 · last modified 2026-06-17.

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: 0.004 (31.7th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Trailofbits Fickling — versions < 0.1.7

Weakness classification (CWE)

References

github.com/trailofbits/fickling/security/advisories/GHSA-5hvc-6wx8-mvv4 (Vendor Advisory)
github.com/trailofbits/fickling/commit/b793563e60a5e039c5837b09d7f4f6b92e6040d1 (Patch)
github.com/trailofbits/fickling/releases/tag/v0.1.7 (Release Notes)

Frequently asked questions

What is CVE-2026-22608?: CVE-2026-22608 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-2026-22608?: High severity. CVSS v3 base score is 7.8 out of 10.