CVE-2025-67747
Fickling has missing detection for marshal.loads and types.FunctionType in unsafe modules list
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
Fickling is a Python pickling decompiler and static analyzer. Versions prior to 0.1.6 are missing `marshal` and `types` from the block list of unsafe module imports. Fickling started blocking both modules to address this issue. This allows an attacker to craft a malicious pickle file that can bypass fickling since it misses detections for `types.FunctionType` and `marshal.loads`. A user who deserializes such a file, believing it to be safe, would inadvertently execute arbitrary code on their system. This impacts any user or system that uses Fickling to vet pickle files for security issues. The issue was fixed in version 0.1.6.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | High7.1 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P |
| NVDNVD · Analyzed | 4.0 | High7.1 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.28% · top 80% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Weakness
Affected products
- affected < 0.1.6
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIficklingGHSA-565g-hwwr-4pp3 (opens in a new tab)
References (4)
- https://github.com/trailofbits/fickling/security/advisories/GHSA-565g-hwwr-4pp3 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/trailofbits/fickling/pull/186 (opens in a new tab)x_refsource_MISC
- https://github.com/trailofbits/fickling/commit/4e34561301bda1450268d1d7b0b2b151de33b913 (opens in a new tab)x_refsource_MISC
- https://github.com/trailofbits/fickling/releases/tag/v0.1.6 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-565g-hwwr-4pp3 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-67747)Record last updated .