CVE-2026-54163
Last modified
CVE-2026-54163 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| github | secure_headers | < 7.3.0 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-54163?
How severe is CVE-2026-54163?
How do I fix CVE-2026-54163?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-54155node-opcua is an OPC UA implementation for TypeScript and No…7.7
- CVE-2026-54156node-opcua is an OPC UA implementation for TypeScript and No…7.5
- CVE-2026-54157LobeHub is a work-and-lifestyle space to find, build, and co…9
- CVE-2026-54158SiYuan is an open-source personal knowledge management syste…9.9
- CVE-2026-54159PrestaShop ps_facetedsearch is a module that adds layered na…10
- CVE-2026-5416Due to the improper neutralization of special elements used …8.8
- CVE-2026-54164API Platform Core is a system to create hypermedia-driven RE…6.5
- CVE-2026-54165Dobase is an open-source, self-hosted workspace with install…6.4
- CVE-2026-54166Shelf is a platform for tracking physical assets. Prior to v…7.1
- CVE-2026-54167Pipelines-as-Code is a CI/CD system that lets users define T…8.2
- CVE-2026-54168Pipelines-as-Code is a CI/CD system that lets users define T…6.5
- CVE-2026-5417A vulnerability was determined in Dataease SQLbot up to 1.6.…4.7
Are you affected by CVE-2026-54163?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST