| Package | Affected versions | Patched versions |
|---|---|---|
| discourse | = 2026.6.0≥ 2026.1.0, < 2026.1.5≥ 2026.4.0, < 2026.4.2≥ 2026.5.0, < 2026.5.1 | 2026.1.52026.4.22026.5.1 |
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic "featured link" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
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