# BabelDOC: Arbitrary Code Execution via CMap Pickle Deserialization in babeldoc/pdfminer/cmapdb.py

Advisory record · `GHSA-m8gf-v64p-gfmg`

- **Identifiers:** `GHSA-m8gf-v64p-gfmg` · `CVE-2026-54071` · `PYSEC-2026-2389`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-502](https://cwe.mitre.org/data/definitions/502.html)
- **Tags:** [Insecure deserialization](https://agentprime.io/advisories/tag/deserialization.md)
- **Published:** 10 Jul 2026
- **Updated:** 13 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 10 Jul 2026, 19:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `babeldoc` (PyPI): affected `<0.6.3`; fixed in `0.6.3`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> BabelDOC versions before 0.6.3 are vulnerable to arbitrary code execution when processing a crafted PDF. The CMap loader passes a PDF-controlled name to a file path and then unpickles the file, so an attacker who can write a pickle file to a predictable local path (such as /tmp) can get code run with the privileges of the BabelDOC process once a user processes the malicious PDF. Upgrade to babeldoc 0.6.3 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0038, the 32nd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:02 UTC: First seen by agentprime
- 31 Oct 2026, 15:02 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-m8gf-v64p-gfmg)

## Sources

- [GitHub Advisory Database: GHSA-m8gf-v64p-gfmg](https://github.com/advisories/GHSA-m8gf-v64p-gfmg)
- [OSV: GHSA-m8gf-v64p-gfmg](https://osv.dev/vulnerability/GHSA-m8gf-v64p-gfmg)
- <https://github.com/funstory-ai/BabelDOC/security/advisories/GHSA-m8gf-v64p-gfmg>
- <https://github.com/funstory-ai/BabelDOC>

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-m8gf-v64p-gfmg>, 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-m8gf-v64p-gfmg/>. Everything for agents: <https://agentprime.io/llms.txt>.