PatchSiren cyber security CVE debrief
CVE-2025-71369 picklescan CVE debrief
CVE-2025-71369 is a high-severity vulnerability in the picklescan library, which failed to detect malicious pickle files using torch.utils.data.datapipes.utils.decoder.basichandlers in reduce methods. This oversight enables remote attackers to embed undetected malicious code in pickle files, leading to remote code execution during deserialization. The vulnerability has a CVSS score of 7.6 and is considered HIGH severity. The CVE was published on July 4, 2026, and has not been modified since. Limited information is available about the affected products and vendors, and further review is needed to determine the full scope of the vulnerability.
- Vendor
- picklescan
- Product
- Unknown
- CVSS
- HIGH 7.6
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-04
- Original CVE updated
- 2026-07-04
- Advisory published
- 2026-07-04
- Advisory updated
- 2026-07-04
Who should care
Organizations using the picklescan library, especially those handling untrusted pickle files, should prioritize patching this vulnerability. Developers and security teams responsible for deserialization processes and data handling should be aware of the risks associated with this vulnerability. Given the HIGH severity and potential for remote code execution, immediate attention is necessary to mitigate potential attacks.
Technical summary
The picklescan library, prior to version 0.0.28, does not properly detect malicious pickle files that utilize torch.utils.data.datapipes.utils.decoder.basichandlers in reduce methods. This allows attackers to bypass safety checks and embed malicious code within pickle files. When these files are deserialized, the embedded code executes, leading to remote code execution. The vulnerability is attributed to CWE-502, 'Deserialization of Untrusted Data.' The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.
Defensive priority
This vulnerability requires immediate defensive priority due to its HIGH severity and potential for remote code execution. Organizations should prioritize patching picklescan to version 0.0.28 or later and implement additional security measures to handle untrusted pickle files.
Recommended defensive actions
- Update picklescan to version 0.0.28 or later to ensure proper detection of malicious pickle files.
- Implement strict validation and sanitization of pickle files before deserialization.
- Restrict the deserialization of pickle files to trusted sources only.
- Monitor for suspicious pickle file activity and implement logging for deserialization events.
- Consider using alternative serialization formats that are less prone to security issues.
Evidence notes
The CVE-2025-71369 details are based on limited information from the NVD and a source item URL. The CVE was published on July 4, 2026, with no subsequent modifications. The vendor and product information is not clearly specified, suggesting a need for further review. The CVE is attributed to CWE-502, indicating a problem with deserialization of untrusted data. Additional research may be necessary to fully understand the vulnerability's impact and affected systems.
Official resources
This article is AI-assisted and based on the supplied source corpus.