{"action":"Upgrade github.com/dunglas/mercure to 0.22.0 or later.","affected":[{"fixed":"0.22.0","introduced":"0"}],"component":"github.com/dunglas/mercure","cve_ids":["CVE-2026-39972"],"ecosystem":"Go","epss":0.00341,"exploited":false,"fixed_versions":["0.22.0"],"ghsa_id":"GHSA-hwr4-mq23-wcv5","id":"tcs_01M5KFD61T4Z23GX60TPX93JRQ","modified_at":"2026-09-10T03:51:02.104486366Z","published_at":"2026-04-08T19:53:20Z","references":["https://osv.dev/vulnerability/GHSA-hwr4-mq23-wcv5","https://github.com/dunglas/mercure/security/advisories/GHSA-hwr4-mq23-wcv5","https://nvd.nist.gov/vuln/detail/CVE-2026-39972","https://github.com/dunglas/mercure/commit/4964a69be904fd61e35b5f1e691271663b6fdd64","https://github.com/dunglas/mercure","https://github.com/dunglas/mercure/releases/tag/v0.22.0"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"GHSA-hwr4-mq23-wcv5","url":"https://osv.dev/vulnerability/GHSA-hwr4-mq23-wcv5"},{"source":"nvd","source_id":"CVE-2026-39972","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39972"}],"summary":"mercure has Topic Selector Cache Key Collision"}