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NVD Vulnerability Details :

CVE-2026-27153

Awaiting Analysis

Source-security-advisories@github.com

Published At-26 Feb, 2026 | 22:20

Updated At-27 Feb, 2026 | 14:06

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in `can_export_entity?`. The method allowed moderators to export any entity not explicitly blocked instead of restricting to an explicit allowlist. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	1.3	LOW	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Type: Secondary

Version: 4.0

Base score: 1.3

Base severity: LOW

Vector:

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE ID	Type	Source
CWE-863	Primary	security-advisories@github.com

CWE ID: CWE-863

Type: Primary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/discourse/discourse/security/advisories/GHSA-5cp2-jq8m-33mf	security-advisories@github.com	N/A

Hyperlink: https://github.com/discourse/discourse/security/advisories/GHSA-5cp2-jq8m-33mf

Source: security-advisories@github.com

Resource: N/A

CISA Catalog

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Evaluator Description

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Change History