CVE-2026-33424 — MEDIUM (5.9)

Q: How severe is CVE-2026-33424?

CVE-2026-33424 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-33424?

Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.

Vulnerability Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an attacker can grant access to a private message topic through invites even after they lose access to that PM. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

CVSS Score

5.9

MEDIUM

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

Attack Vector

ADJACENT_NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

LOW

Affected Products

Vendor	Product	Versions
Discourse	Discourse	>= 2026.1.0, < 2026.1.2

Related Weaknesses (CWE)

CWE-863

References

https://github.com/discourse/discourse/security/advisories/GHSA-hgcp-p7hq-cwxwVendor Advisory

FAQ

What is CVE-2026-33424?

CVE-2026-33424 is a vulnerability with a CVSS score of 5.9 (MEDIUM). Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an attacker can grant access to a private message topic through invites even after they lo...

How severe is CVE-2026-33424?

CVE-2026-33424 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33424?

Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.