Fickling has Code Injection vulnerability via pty.spawn()
Priority HIGH 66CWE-184Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
Fickling is a Python pickling decompiler and static analyzer. Versions prior to 0.1.6 had a bypass caused by `pty` missing from the block list of unsafe module imports. This led to unsafe pickles based on `pty.spawn()` being incorrectly flagged as `LIKELY_SAFE`, and was fixed in version 0.1.6. This impacted any user or system that used Fickling to vet pickle files for security issues.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0027 19th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed fickling (trailofbits): 0.1.6fickling (PyPI): 0.1.6
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| trailofbits | fickling | before 0.1.6 | 0.1.6 | Patch available | CNA |
| — | fickling (PyPI) | before 0.1.6 | 0.1.6 | Patch available | GHSA-r7v6-mfhq-g3m2 |
- fickling Vendortrailofbits Affected before 0.1.6 Fixed in 0.1.6 Patch available CNA
- fickling (PyPI) Vendor— Affected before 0.1.6 Fixed in 0.1.6 Patch available GHSA-r7v6-mfhq-g3m2
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:*:*:* | before 0.1.6 | Vulnerable | trailofbits |
- cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:*:*:* Versions before 0.1.6 Vulnerable ·trailofbits
Remediation
- Fix · CNA fickling (trailofbits) Fixed in 0.1.6
- Fix · GHSA-r7v6-mfhq-g3m2 fickling (PyPI) Fixed in 0.1.6 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-67748
- 2026-10-03 Alias added: GHSA-r7v6-mfhq-g3m2
References
Patch 2
More trailofbits Fickling vulnerabilities
- TI-2026-18173 Fickling vulnerable to detection bypass due to "builtins" blindness CVSS 4.0HIGH 8.9
- TI-2026-18170 Fickling has Static Analysis Bypass via Incomplete Dangerous Module Blocklist CVSS 4.0HIGH 8.9
- TI-2026-18169 Fickling vulnerable to use of ctypes and pydoc gadget chain to bypass detection CVSS 4.0HIGH 8.9
- TI-2026-18168 Fickling Blocklist Bypass: cProfile.run() CVSS 4.0HIGH 8.9
- TI-2026-18167 Fickling has a bypass via runpy.run_path() and runpy.run_module() CVSS 4.0HIGH 8.9
- TI-2026-12265 Fickling MLAllowlist analysis pass rendered inoperative by shared mutable state in AnalysisContext.shorten_code() CVSS 3.1CRITICAL 9.8
Sources
- CVE-2025-67748 · CVE Program
- CVE-2025-67748 · NVD
- FIRST EPSS
- GHSA-r7v6-mfhq-g3m2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences