CVE catalog
CVE-2026-54163
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 b
- Severity
- Medium · CVSS 4.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.21% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ruby-secure-headers | sid | 7.3.0-1 | fixed |
| Debian | ruby-secure-headers | forky | 7.3.0-1 | fixed |
| Debian | ruby-secure-headers | trixie | 6.3.2-2 | vulnerable |
| Debian | ruby-secure-headers | bookworm | 6.3.2-1 | vulnerable |
| Rubygems | secure_headers | Not reported | 7.3.0 | fixed |
| Cpe | ruby-secure-headers | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ruby-secure-headers | source | sid | 7.3.0-1 | not yet assigned | Not reported | Not reported |
| Debian | ruby-secure-headers | source | forky | 7.3.0-1 | not yet assigned | Not reported | Not reported |
| Debian | ruby-secure-headers | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | ruby-secure-headers | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Rubygems | secure_headers | rubygems | Not reported | 7.3.0 | Not reported | Not reported | Not reported |
Notes
[trixie] ruby-secure-headers: Minor issue [bookworm] ruby-secure-headers: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ruby-secure-headers]Affected
Details (2)
6.3.2-1· all · bookwormAffected
nvd · ruby-secure-headers · debian · bookworm; nvd · ruby-secure-headers · debian · 12
6.3.2-1· all · bookwormAffected
nvd · ruby-secure-headers · debian · bookworm; nvd · ruby-secure-headers · debian · 12
[Debian 13 (Trixie)]
- [ruby-secure-headers]Affected
Details (2)
6.3.2-2· all · trixieAffected
nvd · ruby-secure-headers · debian · 13
6.3.2-2· all · trixieAffected
nvd · ruby-secure-headers · debian · 13
Observed:
References
- [https://github.com/advisories/GHSA-rqq5-2gf9-4w4q]
- [https://github.com/github/secure_headers/commit/286a79dea80c6a9be4ca93e0f284c923cf77e539]
- [https://github.com/github/secure_headers/releases/tag/v7.3.0]
- [https://github.com/github/secure_headers/security/advisories/GHSA-rqq5-2gf9-4w4q]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-54163]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-54163]
- [https://security-tracker.debian.org/tracker/CVE-2026-54163]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]