Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, the discourse-local-dates plugin rendered crafted local-date format data as HTML on sites with a modified or disabled default Content Security Policy. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.
https://github.com/discourse/discourse/security/advisories/GHSA-rw96-2xg7-h54g
https://github.com/discourse/discourse/commit/d5d5055fbdf04d5bd72fcaa7e4257fac5adac049
https://github.com/discourse/discourse/commit/a7e509bfa1aa6288b447503de6ef798c31a62751
https://github.com/discourse/discourse/commit/981ba23d33d2e2d98f6690734116af58f2cea938
https://github.com/discourse/discourse/commit/9768f476ed86ea202440cd2b6245af8a4f94ec69
Published: 2026-08-10
Updated: 2026-08-11
Base Score: 1.9
Vector: CVSS2#AV:L/AC:M/Au:N/C:N/I:P/A:N
Severity: Low
Base Score: 2.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Severity: Low
Base Score: 2
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Severity: Low
EPSS: 0.00278