CVE-2026-44780 Discourse: Category queue reviewers can read raw incoming emails from queued posts
Category queue reviewers can read raw incoming email data from queued posts, bypassing intended access controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44780?
CVE-2026-44780 is a medium-severity vulnerability in Discourse Discourse, published on 12 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, ReviewableQueuedPostSerializer unconditionally included payload["raw_email"] for posts that arrived via incoming email. Category moderation group members reaching the review queue could therefore read the full inbound email source (headers, sender trace, MUA, body) without being in view_raw_email_allowed_groups — the trust boundary that gates the dedicated raw-email endpoint. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
Weakness: CWE-200
Which versions are affected by CVE-2026-44780?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | From 2026.1.0 | 2026.1.4, 2026.3.1, 2026.4.1 |
Products include Discourse Discourse.
How do I fix CVE-2026-44780?
Upgrade discourse to a fixed version for your release line: 2026.1.4, 2026.3.1 or 2026.4.1.
Is CVE-2026-44780 being exploited?
There is no known exploitation of CVE-2026-44780 in the wild and no public exploit code.
Other vulnerabilities in Discourse Discourse
- CVE-2021-41163 RCE via malicious SNS subscription payload
- CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file
- CVE-2022-39356 Discourse user account takeover via email and invite link
- CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes
- CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint
Sources
Also known as BIT-discourse-2026-44780, GHSA-h2jr-whpx-6w63.