# Picklescan has a missing detection when calling built-in python trace.Trace.runctx

Advisory record · `GHSA-g344-hcph-8vgg`

- **Identifiers:** `GHSA-g344-hcph-8vgg` · `CVE-2025-71352`
- **State:** Confirmed
- **Severity:** CVSS 7.6 High
- **Critical:** No
- **Weakness (CWE):** [CWE-693](https://cwe.mitre.org/data/definitions/693.html)
- **Tags:** [CWE-693](https://agentprime.io/advisories/tag/cwe-693.md)
- **Published:** 26 Aug 2025
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 26 Aug 2025, 18:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `picklescan` (PyPI): affected `<0.0.29`; fixed in `0.0.29`

## 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 trace.Trace.runctx, a built-in Python function, in a reduce method. An attacker can craft such a file so that picklescan reports it as safe, and when a victim loads it with pickle.load(), the attacker can execute code on the victim's system. Upgrade picklescan to version 0.0.29 or later.

Written 6 Nov 2026.

## 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

- 7.6 High, CVSS 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`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0072, the 54th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:05 UTC: First seen by agentprime
- 31 Oct 2026, 15:05 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-g344-hcph-8vgg)

## Sources

- [GitHub Advisory Database: GHSA-g344-hcph-8vgg](https://github.com/advisories/GHSA-g344-hcph-8vgg)
- [OSV: GHSA-g344-hcph-8vgg](https://osv.dev/vulnerability/GHSA-g344-hcph-8vgg)
- <https://github.com/mmaitre314/picklescan/security/advisories/GHSA-g344-hcph-8vgg>
- <https://github.com/mmaitre314/picklescan/commit/aecd11be98702caa9ba9b12189d91ad596a36114>
- <https://github.com/mmaitre314/picklescan>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-g344-hcph-8vgg>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-g344-hcph-8vgg/>. Everything for agents: <https://agentprime.io/llms.txt>.