{"action":"Upgrade craftcms/cms to 4.16.19 or later.","affected":[{"fixed":"5.8.23","introduced":"5.0.0-RC1"},{"fixed":"4.16.19","introduced":"3.5.0"}],"component":"craftcms/cms","cve_ids":["CVE-2026-27127"],"ecosystem":"Packagist","epss":0.00456,"exploited":false,"fixed_versions":["5.8.23","4.16.19"],"ghsa_id":"GHSA-gp2f-7wcm-5fhx","id":"tcs_01M5KF2XYBYRGF0APQJWQ34TQH","modified_at":"2026-02-28T05:14:37.829487Z","published_at":"2026-02-23T22:16:01Z","references":["https://osv.dev/vulnerability/GHSA-gp2f-7wcm-5fhx","https://github.com/craftcms/cms/security/advisories/GHSA-gp2f-7wcm-5fhx","https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc","https://nvd.nist.gov/vuln/detail/CVE-2026-27127","https://github.com/craftcms/cms/commit/a4cf3fb63bba3249cf1e2882b18a2d29e77a8575","https://curl.se/libcurl/c/CURLOPT_RESOLVE.html","https://github.com/craftcms/cms","https://github.com/mogwailabs/DNSrebinder","https://github.com/nccgroup/singularity","https://github.com/taviso/rbndr","https://unit42.paloaltonetworks.com/dns-rebinding"],"severity":{"label":"high"},"sources":[{"source":"osv","source_id":"GHSA-gp2f-7wcm-5fhx","url":"https://osv.dev/vulnerability/GHSA-gp2f-7wcm-5fhx"}],"summary":"Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding"}