CVE-2026-49256
MEDIUMCVSS v4.0: 6.3
Source data as of:
At a glance
- Severity
- MEDIUM
- CVSS
- 6.3 v4.0 · NVD
- EPSS
- EPSS not provided by FIRST.org for this CVE
- CISA KEV
- No
- Type
- Information Exposure · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo privilegesNo user interaction · Source: NVD Vector
- Published
- 2026-07-09 · Modified: 2026-07-09
- References
- Jump to references (5)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, restricted tag and tag-group names attached to publicly readable categories as allowed_tags, allowed_tag_groups, or required tag groups could leak to anonymous and unauthorized users through category and group endpoints. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Patch https://github.com/discourse/discourse/releases/tag/v2026.1.5
- Patch https://github.com/discourse/discourse/releases/tag/v2026.4.2
- Patch https://github.com/discourse/discourse/releases/tag/v2026.5.1
- Patch https://github.com/discourse/discourse/releases/tag/v2026.6.0
- Vendor advisory https://github.com/discourse/discourse/security/advisories/GHSA-mwp7-572g-6qpx