CVE-2026-38967
CrowCpp Crow, a C++ web framework, has a critical flaw in versions up to 1.3.1 that allows attackers to inject arbitrary HTTP response headers. This can be exploited remotely without any authentication or user interaction.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
CrowCpp Crow HTTP server, versions 1.3.1 and earlier.
Real-world impact
An attacker can add or modify response headers, potentially causing cross‑site scripting, cache poisoning, or other malicious behavior that affects all users of the affected web application.
Why this severity
The CVSS score of 9.8 reflects that the vulnerability can be exploited over the network, requires no privileges or user interaction, and grants full compromise of confidentiality, integrity, and availability of the affected system.
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- Jun 2, 2026 · Jun 2, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 22, 2026 · 13d agoAdvisory updatedThe NVD record was last revised.