CVE-2026-33415 | Discourse up to 2026.1.2/2026.2.1 access control

VDB-354479 · CVE-2026-33415 · EUVD-2026-17574 DISCOURSE UP TO 2026.1.2/2026.2.1 ACCESS CONTROL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 2.6 $0-$5k 3.13+ Summaryinfo A vulnerability classified as critical has been found in Discourse up to 2026.1.2/2026.2.1. This issue affects some unknown processing. The manipulation leads to access control. This vulnerability is traded as CVE-2026-33415. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in Discourse up to 2026.1.2/2026.2.1 and classified as problematic. This issue affects some unknown processing. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality. The summary by CVE is: Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated moderator-level user could retrieve post content, topic titles, and usernames from categories they were not authorized to view. Insufficient access controls on a sentiment analytics endpoint allowed category permission boundaries to be bypassed. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-33415 since 03/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. Upgrading to version 2026.1.3, 2026.2.2 or 2026.3.0 eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17574). Productinfo Type Chat Software Name Discourse Version 2026.1.0 2026.1.1 2026.1.2 2026.2.0 2026.2.1 License open-source Website Product: https://github.com/discourse/discourse/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 2.7 VulDB Meta Temp Score: 2.6 VulDB Base Score: 2.7 VulDB Temp Score: 2.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Access control CWE: CWE-284 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Discourse 2026.1.3/2026.2.2/2026.3.0 Timelineinfo 03/19/2026 CVE reserved 03/31/2026 +11 days Advisory disclosed 03/31/2026 +0 days VulDB entry created 03/31/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-33415 (🔒) GCVE (CVE): GCVE-0-2026-33415 GCVE (VulDB): GCVE-100-354479 EUVD: 🔒 Entryinfo Created: 03/31/2026 20:10 Updated: 03/31/2026 22:00 Changes: 03/31/2026 20:10 (66), 03/31/2026 22:00 (1) Complete: 🔍 Cache ID: 99:0C4:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸