Description
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.
Severity (CVSS)
| Base score | 4.7 |
|---|---|
| Severity | Medium |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Provided by | CNA |
Weaknesses
- CWE-79 — CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CWE-113 — CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Affected products
| Vendor | Product | Versions |
|---|---|---|
| github | secure_headers | < 7.3.0 |
References
- https://github.com/github/secure_headers/security/advisories/GHSA-rqq5-2gf9-4w4q (x_refsource_CONFIRM)
- https://github.com/github/secure_headers/commit/286a79dea80c6a9be4ca93e0f284c923cf77e539 (x_refsource_MISC)
- https://github.com/github/secure_headers/releases/tag/v7.3.0 (x_refsource_MISC)
Generated from the official CVE List on 18 Jul 2026 07:00 UTC.