Which versions of Picklescan are affected by CVE-2025-71366?

picklescan, used by organizations to validate untrusted machine learning models, contains a validation bypass vulnerability affecting versions before 0.0.28.. A patch is available.

How to fix or mitigate CVE-2025-71366?

24 hours: Inventory all systems and data pipelines using picklescan and identify currently deployed versions. 7 days: Implement compensating controls including mandatory code review of untrusted models, network isolation of ML platforms, and removal of pickle deserialization where alternatives exist. 30 days: Monitor official vendor advisories and picklescan release channels for patch version 0.0.28 or later; establish automated security update notification processes.

Picklescan CVE-2025-71366

Q: What is the CVSS score of CVE-2025-71366?

CVE-2025-71366 has a CVSS 4.0 base score of 7.6 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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 probability: 0.4%.

EUVD-2025-210420 HIGH

Deserialization of Untrusted Data (CWE-502)

2026-07-04 VulnCheck

GHSA-gxr9-6xqp-fggf

Deserialization RCE Picklescan

7.6

CVSS 4.0 · Vendor: VulnCheck

Severity by source

Vendor (VulnCheck) PRIMARY

7.6 HIGH

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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

Primary rating from Vendor (VulnCheck) · only source for this CVE.

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Patch available

Jul 04, 2026 - 03:01 EUVD

Analysis Generated

Jul 04, 2026 - 02:16 vuln.today

DescriptionCVE.org

picklescan before 0.0.28 fails to detect malicious torch.utils.bottleneck.__main__.run_cprofile function calls in pickle files, allowing attackers to bypass safety checks. Remote attackers can embed undetected code in pickle files to achieve arbitrary code execution when victims load the files.

AnalysisAI

Security-scanner evasion in picklescan before 0.0.28 lets attackers slip malicious pickle files past its safety checks by abusing the torch.utils.bottleneck.__main__.run_cprofile call, which the scanner's blocklist does not recognize as dangerous. Any ML pipeline or platform that relies on picklescan to vet untrusted models will therefore approve a weaponized file, and the embedded code runs with arbitrary execution when the victim deserializes it. No public exploit identified at time of analysis; not listed in CISA KEV, but VulnCheck published a dedicated advisory and the technique is fully documented.