BIT-discourse-2026-55674
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/discourse/BIT-discourse-2026-55674.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-discourse-2026-55674
- Aliases
-
- CVE-2026-55674
- GHSA-qx4v-rg4v-pm2g
- Published
- 2026-08-21T11:26:39.921Z
- Modified
- 2026-08-21T12:10:31.397085016Z
- Summary
- Discourse: Cache poisoning/XSS via color scheme cookies
- Details
-
Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, an unauthenticated attacker could send a single request with a crafted colorschemeid (or darkschemeid) cookie to inject arbitrary HTML into a Discourse page. Because the cookie value was rendered into a color scheme tag without escaping, the attacker could break out of the attribute and inject a tag that bypassed Discourse's nonce-based Content Security Policy, resulting in arbitrary JavaScript execution in visitors' browsers. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.
- Database specific
{ "severity": "Critical", "cpes": [ "cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*", "cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*" ] }- References
Affected packages
Bitnami / discourse
Package
- Name
- discourse
- Purl
- pkg:bitnami/discourse
Severity
- 9.3 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N CVSS Calculator