CVE-2025-71325 picklescan - Detection Bypass via STACK_GLOBAL Opcode Parsing Logic Flaw
Attackers can bypass picklescan detection by crafting malicious pickle files with specific STACK_GLOBAL opcodes, evading security scanning.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-71325?
CVE-2025-71325 is a critical vulnerability in picklescan, published on 17 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
picklescan before 0.0.27 contains a parsing logic error in the _list_globals function when handling STACK_GLOBAL opcodes, failing to track arguments in the correct range and allowing malicious pickle files to bypass detection. Attackers can craft pickle files with arguments at position zero to trigger unexpected exceptions and evade security scanning.
Weakness: CWE-391
Which versions are affected by CVE-2025-71325?
3 open source packages ship an affected version, including picklescan.
| Package | Affected | Fixed in |
|---|---|---|
picklescan PyPI | All versions | 0.0.27 |
picklescan PyPI | All versions | 0.0.27 |
picklescan PyPI | All versions | 0.0.27 |
How do I fix CVE-2025-71325?
Upgrade picklescan to 0.0.27 or later.
Is CVE-2025-71325 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71325 exists.
Sources
Also known as GHSA-9gvj-pp9x-gcfr, PYSEC-2026-1788.