CVE-2025-71378Public exploit

Code execution via undetected cProfile.runctx reduce call

Published Jun 21, 2026 · Updated Jun 21, 2026

Protection bypass in Matthieu Maitre picklescan before 0.0.30 allows attackers to execute code through a crafted pickle file. A pickle reduce method names cProfile.runctx, but the scanner fails to classify that executable global as dangerous and reports the payload as safe. Code runs only after a user or application trusts the clean result and deserializes the file with pickle.load(), under that process's privileges.

CVSS severity7.6
High
EPSS probability0.48%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection bypass in Matthieu Maitre picklescan before 0.0.30 allows attackers to execute code through a crafted pickle file. A pickle reduce method names cProfile.runctx, but the scanner fails to classify that executable global as dangerous and reports the payload as safe. Code runs only after a user or application trusts the clean result and deserializes the file with pickle.load(), under that process's privileges.

The record

CVE
CVE-2025-71378
Published
Jun 21, 2026
Updated
Jun 21, 2026
Vendor
Matthieu Maitre
Product
picklescan
Classifications
CWE-502, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 21, 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 <0.0.30

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Matthieu Maitre · picklescanversion=0 <0.0.30

Published CVSS scores

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
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A: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.

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002User Execution: Malicious File

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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