PYSEC-2026-1369 Fickling vulnerable to use of ctypes and pydoc gadget chain to bypass detection

Fickling's assessment pydoc and ctypes were added to the list of unsafe imports https://github.com/trailofbits/fickling/commit/b793563e60a5e039c5837b09d7f4f6b92e6040d1. Original report Summary Both ctypes and pydoc modules arent explictly blocked. Even other existing pickle scanning tools like...

PYSEC-2026-1371 Fickling Blocklist Bypass: cProfile.run()

Fickling's assessment cProfile was added to the list of unsafe imports https://github.com/trailofbits/fickling/commit/dc8ae12966edee27a78fe05c5745171a2b138d43. Original report Description Summary Fickling versions up to and including 0.1.6 do not treat Python's cProfile module as unsafe. Because ...

PYSEC-2026-1368 Fickling has missing detection for marshal.loads and types.FunctionType in unsafe modules list

Fickling Assessment Based on the test case provided in the original report below, this bypass was caused by marshal and types missing from the block list of unsafe module imports, Fickling started blocking both modules to address this issue. This was fixed in...

CVE-2026-14535

A flaw was found in the fickling library, versions up to and including 0.1.11. A logic error in the security analysis passes allows an attacker to bypass intended safety checks during pickle deserialization. This vulnerability enables the invocation of arbitrary standard library modules, leading ...

CVE-2026-14534

A flaw was found in the fickling library, which is designed to safely handle Python pickle data. The library's security checks in versions up to and including 0.1.10 fail to properly identify and block certain dangerous Python standard library modules during deserialization. This oversight allows...

Protection Mechanism Failure

Overview fickling is an A static analyzer and interpreter for Python pickle data Affected versions of this package are vulnerable to Protection Mechanism Failure due to shared mutable state in the shortencode function. An attacker can execute arbitrary code by providing a malicious pickle payload...

Incomplete List of Disallowed Inputs

Overview fickling is an A static analyzer and interpreter for Python pickle data Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs via the checksafety function. An attacker can execute arbitrary code by crafting pickle payloads that import unlisted standard...

PYSEC-2026-2149

Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules posixsubprocess, site, and atexit in the UNSAFEIMPORTS denylist fickle.py. Because these modules are absent from the denylist, fickling's checksafety function returns LIKELYSAFE with zero...

CVE-2026-14534

Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules posixsubprocess, site, and atexit in the UNSAFEIMPORTS denylist fickle.py. Because these modules are absent from the denylist, fickling's checksafety function returns LIKELYSAFE with zero...

CVE-2026-14535

Summary: CVE-2026-14535 affects Trail of Bits fickling up to version 0.1.11. A logic error in the UnsafeImportsML and MLAllowlist passes causes shared mutable state (AnalysisContext.reported_shortened_code) to poison deduplication, rendering MLAllowlist dead code and allowing certain pickle paylo...

CVE-2026-14534 Fickling check_safety() bypass via unlisted standard library modules (_posixsubprocess, site, atexit)

Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules posixsubprocess, site, and atexit in the UNSAFEIMPORTS denylist fickle.py. Because these modules are absent from the denylist, fickling's checksafety function returns LIKELYSAFE with zero...

CVE-2026-14534

Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules posixsubprocess, site, and atexit in the UNSAFEIMPORTS denylist fickle.py. Because these modules are absent from the denylist, fickling's checksafety function returns LIKELYSAFE with zero...

CVE-2026-14534

The CVE-2026-14534 issue affects the Python package fickling, up to version 0.1.10. The root cause is that the UNSAFE_IMPORTS denylist omits three standard library modules — _posixsubprocess, site, and atexit — causing check_safety() to return LIKELY_SAFE and allowing pickle payloads to deseriali...

CVE-2026-14534 Fickling check_safety() bypass via unlisted standard library modules (_posixsubprocess, site, atexit)

Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules posixsubprocess, site, and atexit in the UNSAFEIMPORTS denylist fickle.py. Because these modules are absent from the denylist, fickling's checksafety function returns LIKELYSAFE with zero...

GHSA-5CXW-W2XG-2M8H fickling's `platform` module subprocess invocation evades `check_safety()` with `LIKELY_SAFE`

Our assessment We added platform to the blocklist of unsafe modules https://github.com/trailofbits/fickling/commit/351ed4d4242b447c0ffd550bb66b40695f3f9975. It was not possible to inject extra arguments to file without first monkey-patching platform.followsymlinks with the pickle, as it always...

fickling's `platform` module subprocess invocation evades `check_safety()` with `LIKELY_SAFE`

Our assessment We added platform to the blocklist of unsafe modules https://github.com/trailofbits/fickling/commit/351ed4d4242b447c0ffd550bb66b40695f3f9975. It was not possible to inject extra arguments to file without first monkey-patching platform.followsymlinks with the pickle, as it always...

fickling modules linecache, difflib and gc are missing from the unsafe modules blocklist

Our analysis As stated in the project's security policy, we also don't consider UnusedVariables bypasses to be security issues. We added several unsafe modules mentioned by the reporter in advisory comments to the blocklist...

Incomplete List of Disallowed Inputs

Overview fickling is an A static analyzer and interpreter for Python pickle data Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs in the UNSAFEIMPORTS list. An attacker can execute arbitrary system commands by crafting a malicious pickle file that imports...

GHSA-5HWF-RC88-82XM Fickling missing RCE-capable modules in UNSAFE_IMPORTS

Assessment The modules uuid, osxsupport and aixsupport were added to the blocklist of unsafe imports https://github.com/trailofbits/fickling/commit/ffac3479dbb97a7a1592d85991888562d34dd05b. Original report Summary fickling's UNSAFEIMPORTS blocklist is missing at least 3 stdlib modules that provid...

Fickling missing RCE-capable modules in UNSAFE_IMPORTS

Assessment The modules uuid, osxsupport and aixsupport were added to the blocklist of unsafe imports https://github.com/trailofbits/fickling/commit/ffac3479dbb97a7a1592d85991888562d34dd05b. Original report Summary fickling's UNSAFEIMPORTS blocklist is missing at least 3 stdlib modules that provid...