{"action":"Upgrade github.com/gofiber/fiber/v2 to 2.52.13 or later.","affected":[{"fixed":"2.52.13","introduced":"0"}],"component":"github.com/gofiber/fiber/v2","cve_ids":["CVE-2026-42554"],"ecosystem":"Go","epss":0.00212,"exploited":false,"fixed_versions":["2.52.13"],"ghsa_id":"GHSA-qjv7-627w-8qjv","id":"tcs_01M5KFK69VJRJ33PMSAMQK44T7","modified_at":"2026-09-10T03:50:47.332641426Z","published_at":"2026-05-05T20:13:23Z","references":["https://osv.dev/vulnerability/GHSA-qjv7-627w-8qjv","https://github.com/gofiber/fiber/security/advisories/GHSA-qjv7-627w-8qjv","https://nvd.nist.gov/vuln/detail/CVE-2026-42554","https://github.com/gofiber/fiber"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-qjv7-627w-8qjv#Go/github.com/gofiber/fiber/v2","url":"https://osv.dev/vulnerability/GHSA-qjv7-627w-8qjv"}],"summary":"Fiber vulnerable to XSS in AutoFormat Content Negotiation"}