CVE-2026-27491Disclosure(discourse / discourse)

LOWCVSS 4.3 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a type coercion issue in a post actions API endpoint allowed non-staff users to issue warnings to other users. Warnings are a staff-only moderation feature. The vulnerability required the attacker to be a logged-in user and to send a specifically crafted request. No data exposure or privilege escalation beyond the ability to create unauthorized user warnings was possible. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

discourse CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Patch / fix

Vendor / third-party advisories

https://github.com/discourse/discourse/security/advisories/GHSA-xq37-5fvf-4m4j

Weakness type (CWE)

CWE-862

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

discourse

Threat summary

3 mentions across 2 observed days
Momentum state: stable

What's happening

Technical details provided in 3 signals
Disclosure: 2 classified signals
General: 1 classified signal
Peaked at 2 mentions on most recent observed day (2026-03-22)
3 total mentions across 2 days

Affected systems

Vendors

discourse

Products

discourse

1 version affected across 1 product

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Disclosure

266.7%

General

133.3%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-03-20	1	Disclosure1
2026-03-22	2	Disclosure1General1

Full discourse3 posts

Infoflowcloud@infoflowcloud203d
General
🚨*CVE* CVE-2026-27491 Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a type coercion issue in a post actions API endpoint all… https://www.cve.org/CVERecord?id=CVE-2026-27491 ----- Traducción: CVE-2026-27491 Dis… http://infoflow.cloud`
Post summary
The tweet announces a type coercion flaw in Discourse (CVE‑2026‑27491) with affected version references but lacks PoC, exploit, or mitigation details.
0000028
61 followersView on X
CVE@CVEnew203d
Disclosure
CVE-2026-27491 Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a type coercion issue in a post actions API endpoint all… https://www.cve.org/CVERecord?id=CVE-2026-27491
Post summary
The post announces a type coercion vulnerability in Discourse prior to certain releases, referencing the CVE record.
00000259
56.8K followersView on X
Vulmon Vulnerability Feed@VulmonFeeds206d
Disclosure
CVE-2026-27491 Unauthorized User Warning Injection in Discourse Platform Prior to 2026.3.0 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-27491
Post summary
The message announces CVE‑2026‑27491, a warning‑injection flaw in Discourse Platform before 2026.3.0, and directs readers to a vulnerability details page.
0000038
4.0K followersView on X

CPE platform detail2 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

2 of 2 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	discourse	discourse	-	-	-
App	discourse	discourse	2026.3.0	-	-

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