{"cve":"CVE-2021-26924","nvd":{"published":"2021-03-15T15:15:14.727","modified":"2026-06-17T03:44:01.027","status":"Modified","description":"An issue was discovered in Argo CD before 1.8.4. Browser XSS protection is not activated due to the missing XSS protection header.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/argoproj/argo-cd/compare/v1.8.3...v1.8.4","https://github.com/argoproj/argo-cd/security/advisories/GHSA-pg99-h5gc-446r","https://github.com/argoproj/argo-cd/compare/v1.8.3...v1.8.4","https://github.com/argoproj/argo-cd/security/advisories/GHSA-pg99-h5gc-446r"],"products":["argoproj:argo_cd"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2021-26924","score":0.00788,"percentile":0.56196,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}