What is CVE-2026-57447?

CVE-2026-57447 is a medium-severity vulnerability in Discourse Discourse-Doc-Categories, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-10-16.

How severe is CVE-2026-57447?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Discourse Discourse-Doc-Categories

CVE-2026-57447

Discourse Doc Categories is a plugin for organizing Discourse topics as documentation. Prior to the verified source fix, the doc category index refresh resolves linked titles for private messages or restricted category topics without enforcing the viewer's authorization. A user who can edit the index topic can use this behavior to learn titles that the user is not authorized to view, although the advisory does not establish access to topic contents. This vulnerability is addressed by commit b15d4de02ad29d7c9525346afee51fef4a2c605a.

Vulnerability class: Information Disclosure

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Discourse Discourse-Doc-Categories — versions < b15d4de02ad29d7c9525346afee51fef4a2c605a

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

Frequently asked questions

What is CVE-2026-57447?: CVE-2026-57447 is a medium-severity vulnerability in Discourse Discourse-Doc-Categories, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-10-16.
How severe is CVE-2026-57447?: Medium severity. CVSS v3 base score is 4.3 out of 10.