Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Picklescan versions before 0.0.29 fail to flag pickle files that call idlelib.calltip.Calltip.fetch_tip, a built-in Python function, so malicious pickles pass its scan. An attacker can craft a pickle that uses this function to run remote code, and it executes when a victim loads the file with pickle.load() after Picklescan reports it as safe. Upgrade picklescan to version 0.0.29 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.6 | High | 4.0 | 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 | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0043, the 37th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:42 UTC First seen by agentprime
- 31 Oct 2026, 14:42 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-8r4j-24qv-fmq9
- OSV: GHSA-8r4j-24qv-fmq9
- github.com/mmaitre314/picklescan/security/advisories/GHSA-8r4j-24qv-fmq9
- nvd.nist.gov/vuln/detail/CVE-2025-71361
- github.com/mmaitre314/picklescan/commit/aecd11be98702caa9ba9b12189d91ad596a36114
- github.com/advisories/GHSA-8r4j-24qv-fmq9
- github.com/mmaitre314/picklescan
- github.com/pypa/advisory-database/tree/main/vulns/picklescan/PYSEC-2026-1786.yaml
- pypi.org/project/picklescan
- www.vulncheck.com/advisories/picklescan-remote-code-execution-via-undetected-idlelib-calltip-calltip-fetch-tip