CVE-2025-71347Public exploitNetwork attack vector

Code execution via unflagged param_eval reduce target

Published Jul 4, 2026 · Updated Jul 4, 2026

Protection bypass in picklescan before 0.0.33 allows remote attackers to execute code through a malicious pickle that passes scanning. The scanner's unsafe-global policy does not flag numpy.f2py.crackfortran.param_eval when a pickle reduce tuple names it, so the file is reported as safe. Execution occurs only if a user or application later deserializes the attacker-supplied file, and the payload runs with that process's privileges.

CVSS severity7.6
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection bypass in picklescan before 0.0.33 allows remote attackers to execute code through a malicious pickle that passes scanning. The scanner's unsafe-global policy does not flag numpy.f2py.crackfortran.param_eval when a pickle reduce tuple names it, so the file is reported as safe. Execution occurs only if a user or application later deserializes the attacker-supplied file, and the payload runs with that process's privileges.

The record

CVE
CVE-2025-71347
Published
Jul 4, 2026
Updated
Jul 4, 2026
Vendor
Matthieu Maitre
Product
picklescan
Classifications
CWE-502, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.0.33

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Matthieu Maitre · picklescanversion=0 <0.0.33

Published CVSS scores

8.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
7.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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