Discourse up to 2026.1.3/2026.3.0/2026.4.0 Dedicated raw-email Endpoint payload["raw_email"] information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k4.05-

Summaryinfo

A vulnerability marked as problematic has been reported in Discourse up to 2026.1.3/2026.3.0/2026.4.0. Affected by this issue is some unknown functionality of the component Dedicated raw-email Endpoint. The manipulation of the argument payload["raw_email"] leads to information disclosure. This vulnerability is referenced as CVE-2026-44780. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Discourse up to 2026.1.3/2026.3.0/2026.4.0. It has been rated as problematic. This issue affects an unknown code of the component Dedicated raw-email Endpoint. The manipulation of the argument payload["raw_email"] with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-44780 since 05/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 2026.1.4, 2026.3.1 or 2026.4.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Discourse 2026.1.4/2026.3.1/2026.4.1

Timelineinfo

05/07/2026 CVE reserved
06/13/2026 +37 days Advisory disclosed
06/13/2026 +0 days VulDB entry created
06/13/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-h2jr-whpx-6w63
Status: Confirmed

CVE: CVE-2026-44780 (🔒)
GCVE (CVE): GCVE-0-2026-44780
GCVE (VulDB): GCVE-100-370745

Entryinfo

Created: 06/13/2026 06:43
Changes: 06/13/2026 06:43 (66)
Complete: 🔍
Cache ID: 216::103

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Discussion

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