CVE-2026-72728

6.3 mediumEPSS 0.3%

Medium (6.3). EPSS 0.3% chance of exploitation in the next 30 days.

Discourse is an open-source discussion platform. Prior to 2026.1.7, an authenticated user could submit specially formed URLs that bypassed the Onebox allowlist and embedded malicious content in a site. This issue is fixed in versions 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1.

Severity

CVSS 3.1

6.3 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2026-08-10
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

References

https://github.com/discourse/discourse/commit/92eec47e8b477cb8b4ccdb237e26dc1ba8f8b76b
https://github.com/discourse/discourse/security/advisories/GHSA-qp9j-3v7r-wrvr

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