Raw email disclosure via unconditional queue serialization
Published Jun 12, 2026 · Updated Jun 12, 2026
Information disclosure in Discourse allows remote authenticated users to read raw inbound emails through category moderation review queues. The ReviewableQueuedPostSerializer unconditionally places payload["raw_email"] into queued-post output instead of applying the view_raw_email_allowed_groups check used by the dedicated endpoint. Membership in a category moderation group and access to an email-originated queued post expose message headers, sender trace, mail-client details, and body content.
Summary
What happened
Information disclosure in Discourse allows remote authenticated users to read raw inbound emails through category moderation review queues. The ReviewableQueuedPostSerializer unconditionally places payload["raw_email"] into queued-post output instead of applying the view_raw_email_allowed_groups check used by the dedicated endpoint. Membership in a category moderation group and access to an email-originated queued post expose message headers, sender trace, mail-client details, and body content.
The record
- CVE
- CVE-2026-44780
- Published
- Jun 12, 2026
- Updated
- Jun 12, 2026
- Vendor
- Discourse
- Product
- Discourse
- Classifications
- CWE-200, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 12, 2026CVE publishedPublication date reported by the CVE source.
- Jun 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 2026.1.0-latest, < 2026.1.4
- Affected versionversion=>= 2026.3.0-latest, < 2026.3.1
- Affected versionversion=>= 2026.4.0-latest, < 2026.4.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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