# CVE-2026-27934

## Summary

- **CVE ID:** CVE-2026-27934
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-201
- **Published:** Mar 19, 2026
- **Last Modified:** Mar 20, 2026

## Description

Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a lack of visibility checks with a user action API endpoint that results in disclosure of the title and post excerpt to unauthorized users, leading to information disclosure. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

## Affected Products

- discourse — discourse (>= 2026.1.0-latest, < 2026.1.2)
- discourse — discourse (>= 2026.2.0-latest, < 2026.2.1)
- discourse — discourse (= 2026.3.0-latest)

## References

- [CNA](https://github.com/discourse/discourse/security/advisories/GHSA-824f-66wh-xx3g)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.25%
- **EPSS Percentile:** 17.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._