CVSS 4.0
8.9 highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:PCVE-2026-22607
High (8.9) in trailofbits fickling. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in fickling 0.1.7.
Fickling is a Python pickling decompiler and static analyzer. Fickling versions up to and including 0.1.6 do not treat Python's cProfile module as unsafe. Because of this, a malicious pickle that uses cProfile.run() 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.
Severity
CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-184, CWE-502
- Published
- Modified
- Record from
- the NVD, synced
Affected
- trailofbits:fickling
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-p523-jq9w-64x9 | PyPI | fickling | <0.1.7 | 0.1.7 |
| PYSEC-2026-1371 | PyPI | fickling | <0.1.7 | 0.1.7 |
References
- https://github.com/trailofbits/fickling/commit/dc8ae12966edee27a78fe05c5745171a2b138d43
- https://github.com/trailofbits/fickling/releases/tag/v0.1.7
- https://github.com/trailofbits/fickling/security/advisories/GHSA-p523-jq9w-64x9
- https://github.com/trailofbits/fickling/security/advisories/GHSA-p523-jq9w-64x9