HOMEVULNERABILITIESCVE-2026-27150
LOW

CVE-2026-27150

CWE-862Published: February 26, 2026· Updated: Mar 2, 2026

3.8
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:11.3th

Official Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, missing `validate_before_create` authorization in Data Explorer's `QueryGroupBookmarkable` allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata disclosure via bookmark reminder notifications. Versions 2025.12.2, 2026.1.1, and 2026.2.0 fix this issue and also make sure `validate_before_create` throws NotImplementedError in BaseBookmarkable if not implemented, to prevent similar issues in the future. No known workarounds are available.

NVD Source

Technical Analysis

CVE-2026-27150 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

discourse1 product
discourse
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/discourse/discourse/security/advisories/GHSA-rw95-54qr-qrw8

All References (1)

→
https://github.com/discourse/discourse/security/advisories/GHSA-rw95-54qr-qrw8Vendor Advisory

Quick Facts

CVE IDCVE-2026-27150
CVSS Score3.8 / 10
SeverityLOW
WeaknessCWE-862
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedFeb 26, 2026

Related CVEs (CWE-862)

CVE-2026-34976
10.0
CVE-2026-0092
10.0
CVE-2026-2031
10.0
CVE-2025-30416
10.0
CVE-2026-33712
10.0
CVE-2026-44442
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-27150 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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