CVE WatchJul 14, 2026

CVE-2026-55424

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 suffic

CVSS

5.4

Medium

EPSS

0.3%

p19

KEV

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Exploit Today

0-100

Published: Jul 9, 2026 · Last modified: Jul 14, 2026 · CWE-79

EPSS · 30d

0.3%EPSS · 30 days0.5%

2026-07-102026-07-21

Technical description

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.

Official references

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