{"action":"Upgrade github.com/axllent/mailpit to 1.28.3 or later.","affected":[{"fixed":"1.28.3","introduced":"0"}],"component":"github.com/axllent/mailpit","cve_ids":["CVE-2026-23829"],"ecosystem":"Go","epss":0.01402,"exploited":false,"fixed_versions":["1.28.3"],"ghsa_id":"GHSA-54wq-72mp-cq7c","id":"tcs_01M5KEXN6TMF88G8CPMDANXGVS","modified_at":"2026-02-03T22:41:18.430374Z","published_at":"2026-01-20T17:54:55Z","references":["https://osv.dev/vulnerability/GHSA-54wq-72mp-cq7c","https://github.com/axllent/mailpit/security/advisories/GHSA-54wq-72mp-cq7c","https://nvd.nist.gov/vuln/detail/CVE-2026-23829","https://github.com/axllent/mailpit/commit/36cc06c125954dec6673219dafa084e13cc14534","https://github.com/axllent/mailpit","https://github.com/axllent/mailpit/releases/tag/v1.28.3"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-54wq-72mp-cq7c","url":"https://osv.dev/vulnerability/GHSA-54wq-72mp-cq7c"}],"summary":"Mailpit has an SMTP Header Injection via Regex Bypass"}