{"action":"Upgrade decidim-core to 0.30.5 or later.","affected":[{"fixed":"0.31.1","introduced":"0.31.0.rc1"},{"fixed":"0.30.5","introduced":"0"}],"component":"decidim-core","cve_ids":["CVE-2026-23891"],"ecosystem":"RubyGems","epss":0.00356,"exploited":false,"fixed_versions":["0.31.1","0.30.5"],"ghsa_id":"GHSA-fc46-r95f-hq7g","id":"tcs_01M5KEK002MTPBXZXQDBQJNZDP","modified_at":"2026-05-13T16:38:42.323225Z","published_at":"2026-04-13T16:35:13Z","references":["https://osv.dev/vulnerability/GHSA-fc46-r95f-hq7g","https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g","https://nvd.nist.gov/vuln/detail/CVE-2026-23891","https://github.com/decidim/decidim","https://github.com/decidim/decidim/releases/tag/v0.30.5","https://github.com/decidim/decidim/releases/tag/v0.31.1","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim-core/CVE-2026-23891.yml"],"severity":{"label":"high","score":8.7},"sources":[{"source":"osv","source_id":"GHSA-fc46-r95f-hq7g","url":"https://osv.dev/vulnerability/GHSA-fc46-r95f-hq7g"}],"summary":"Decidim has a cross-site scripting (XSS) in user name"}