Remote Code Execution via Picklescan Detection Bypass
CVE-2025-71361 is a remote code execution vulnerability affecting picklescan before version 0.0.29. The flaw is a detection bypass in which picklescan fails to identify malicious pickle payloads that invoke idlelib.calltip.Calltip.fetch_tip. As a result, an attacker can craft a pickle file that appears to pass scanning but still contains executable malicious behavior. If that pickle file is subsequently deserialized with Python's pickle.load(), the embedded payload can execute arbitrary code. The issue is therefore not in pickle deserialization itself, but in picklescan's incomplete detection logic, which can cause downstream systems or users to incorrectly trust a malicious serialized object.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.