# picklescan missing detection by simple obfuscation of a \`builtins.eval\` call

Advisory record · `GHSA-9m3x-qqw2-h32h`

- **Identifiers:** `GHSA-9m3x-qqw2-h32h` · `CVE-2026-53874` · `PYSEC-2026-1789`
- **State:** Confirmed
- **Severity:** CVSS 9.3 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-502](https://cwe.mitre.org/data/definitions/502.html)
- **Tags:** [Insecure deserialization](https://agentprime.io/advisories/tag/deserialization.md)
- **Published:** 2 Feb 2026
- **Updated:** 7 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 2 Feb 2026, 20:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.3: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `picklescan` (PyPI): affected `<1.0.1`; fixed in `1.0.1`

## 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

- 9.3 Critical, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0052, the 44th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 17 Jun 2026, 15:05 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-53874)

## Sources

- [GitHub Advisory Database: GHSA-9m3x-qqw2-h32h](https://github.com/advisories/GHSA-9m3x-qqw2-h32h)
- [OSV: GHSA-9m3x-qqw2-h32h](https://osv.dev/vulnerability/GHSA-9m3x-qqw2-h32h)
- <https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9m3x-qqw2-h32h>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-53874>
- <https://github.com/mmaitre314/picklescan/pull/59>
- <https://github.com/mmaitre314/picklescan/commit/173c8f2a869ea9b69b543477525ec70611c3c6f4>
- <https://github.com/mmaitre314/picklescan>
- <https://github.com/mmaitre314/picklescan/releases/tag/v1.0.1>
- <https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-obfuscated-eval-call>

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-9m3x-qqw2-h32h>, 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-9m3x-qqw2-h32h/>. Everything for agents: <https://agentprime.io/llms.txt>.