CVE-2026-54163

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{"affected": [{"affectedData": [{"product": "secure_headers", "vendor": "github", "versions": [{"status": "affected", "version": "< 7.3.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "secure_headers manages application of security headers with many safe defaults. Prior to 7.3.0, secure_headers builds the Content-Security-Policy value by stitching directives with ; separators, and build_sandbox_list_directive, build_media_type_list_directive, and build_report_to_directive interpolate caller-supplied strings without scrubbing ;, \\r, or \\n. When untrusted input reaches SecureHeaders.override_content_security_policy_directives or append APIs for :sandbox, :plugin_types, or :report_to, an attacker can inject a CSP directive such as script-src 'unsafe-inline' * before the legitimate script-src, enabling XSS reachability through these sinks or CSP report exfiltration. This issue is fixed in version 7.3.0."}, {"lang": "es", "value": "secure_headers gestiona la aplicaci\u00f3n de encabezados de seguridad con muchos valores predeterminados seguros. Antes de la versi\u00f3n 7.3.0, secure_headers construye el valor de Content-Security-Policy uniendo directivas con separadores ;, y build_sandbox_list_directive, build_media_type_list_directive y build_report_to_directive interpolan cadenas proporcionadas por el llamador sin limpiar ;, \\r, o \\n. Cuando una entrada no confiable llega a SecureHeaders.override_content_security_policy_directives o a las API de adici\u00f3n para :sandbox, :plugin_types o :report_to, un atacante puede inyectar una directiva CSP como script-src \u2019unsafe-inline\u2019 * antes del script-src leg\u00edtimo, permitiendo la alcanzabilidad de XSS a trav\u00e9s de estos sumideros o la exfiltraci\u00f3n de informes CSP. Este problema est\u00e1 solucionado en la versi\u00f3n 7.3.0."}], "id": "CVE-2026-54163", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54163", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-20T17:45:32.192836Z", "version": "2.0.3"}}]}, "published": "2026-07-17T21:17:08.107", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/github/secure_headers/commit/286a79dea80c6a9be4ca93e0f284c923cf77e539"}, {"source": "security-advisories@github.com", "url": "https://github.com/github/secure_headers/releases/tag/v7.3.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/github/secure_headers/security/advisories/GHSA-rqq5-2gf9-4w4q"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/github/secure_headers/security/advisories/GHSA-rqq5-2gf9-4w4q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-113"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.3.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "secure_headers", "source": "cna", "vendor": "github"}, "product": "secure_headers", "vendor": "github"}], "created": "2026-07-22T01:45:15.050855+00:00", "updated": "2026-07-30T23:45:05.246104+00:00", "vendors": ["github", "github$PRODUCT$secure_headers"]}