Is CVE-2026-28219 in the CISA KEV catalog?

No. CVE-2026-28219 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-28219?

CVE-2026-28219 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2026-28219?

CVE-2026-28219 has an EPSS score of 0.20% (10th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-28219?

Upgrade discourse to 2026.1.1 or later.

CVE & CISA-KEV Catalog

CVE-2026-28219

MEDIUM

4.3

CVSS v3

NVD

Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, an improper authorization check in the topic management logic allows authenticated users to modify privileged attributes of their topics. By manipulating specific parameters in a PUT or POST request, a regular user can elevate a topic’s status to a site-wide notice or banner, bypassing intended administrative restrictions. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. There are no practical workarounds to prevent this behavior other than applying the security patch. Administrators concerned about unauthorized promotions should audit recent changes to site banners and global notices until the fix is deployed.

CWE-915

How to fix

Remediation Available

discourseNVD

Affected:>= 2026.1.0, < 2026.1.1Fixed in:2026.1.1CVE-2026-28219derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

0.20%probability of exploitation in 30 days

10thpercentile

Low risk: more likely to be exploited than 10% of all known CVEs.

References

Vendor Advisory1

github.com

Related Vulnerabilities

Other CWE-915 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-4068	Medium	5.4	34%	-	Fix
CVE-2024-5452	Critical	9.8	26%	-	Fix
CVE-2026-30822	High	7.7	13%	-	Fix
CVE-2026-33453	Critical	10.0	6.2%	-	-
CVE-2022-43441	High	8.1	2.4%	-	Fix
CVE-2021-32811	High	7.5	2.3%	-	Fix

Embed a live status badge for CVE-2026-28219

Markdown

[![CVE-2026-28219](https://tridentstack.com/cve/badge/CVE-2026-28219.svg)](https://tridentstack.com/cve/CVE-2026-28219)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-28219"><img src="https://tridentstack.com/cve/badge/CVE-2026-28219.svg" alt="CVE-2026-28219"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-02.