CVE-2025-71352
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedpicklescan before 0.0.29 fails to detect the built-in Python trace.Trace.runctx function when used in pickle file reduce methods, allowing attackers to execute arbitrary code. Remote attackers can craft malicious pickle files with trace.Trace.runctx payloads that bypass picklescan detection and execute code upon pickle.load() invocation.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidencepicklescan before version 0.0.29 fails to detect the built-in Python trace.Trace.runctx function when used in pickle file reduce methods, allowing malicious pickle files to bypass detection and execute arbitrary code upon pickle.load() invocation.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check if picklescan is installedRun 'pip show picklescan' or 'pip list | grep picklescan' to see if the package is present in your Python environmentAffected if picklescan is installed and used to scan pickle files from any source
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Determine the installed version of picklescanRun 'pip show picklescan' and note the Version field, or use 'pip index versions picklescan' to see available versionsAffected if The installed version is lower than 0.0.29 (e.g., 0.0.28, 0.0.27, etc.)
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Verify if picklescan is used in automated scanning pipelinesReview your codebases, CI/CD pipelines, or security workflows for uses of the picklescan library or CLI tool scanning pickle filesAffected if picklescan is used to validate pickle files from untrusted or external sources
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Confirm pickle file sources in your environmentSearch for code that calls pickle.load() or uses deserialization on files from users, APIs, uploads, or network sourcesAffected if Your application loads pickle files from untrusted sources and relies on picklescan for security validation
You are affected if you have picklescan installed with a version before 0.0.29 and use it to scan pickle files from untrusted sources, as malicious pickle files using trace.Trace.runctx in reduce methods can bypass detection.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedUpgrade picklescan to version 0.0.29 or later to include the missing detection rule, and continue to avoid loading pickle files from untrusted sources as a defense-in-depth measure.
picklescan version 0.0.29 or later
- 1. Identify the current installed version of picklescan by running: pip show picklescan or pip list | grep picklescan
- 2. Upgrade picklescan to version 0.0.29 or later by running: pip install picklescan>=0.0.29
- 3. Verify the upgrade was successful by running: pip show picklescan and confirming the version number is 0.0.29 or higher
- 4. Re-scan any previously scanned pickle files with the updated picklescan to ensure they are now properly detected
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-71352 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-71352 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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