CVE-2023-45648 Scanner.
Apache Tomcat - HTTP Request Smuggling
Free and read-only. Scan only sites you own or are allowed to test.
What This Check Does.
Read-only
It only asks your site for public pages, the way a browser would. Nothing is changed, uploaded or stored.
Up to 1 request
A small, fixed number of requests, so the check is quick and will not load your site.
Looks for CVE-2023-45648
It looks for the specific sign of this one vulnerability and ends with a clear answer: vulnerable, not vulnerable, or could not be determined.
About CVE-2023-45648. What It Means.
Apache Tomcat from versions 8.5.0 to 8.5.93, 9.0.0-M1 to 9.0.81, 10.1.0-M1 to 10.1.13, and 11.0.0-M1 to 11.0.0-M11 contain an improper input validation caused by incorrect parsing of HTTP trailer headers, letting attackers craft headers to cause request smuggling, exploit requires sending malicious trailer headers.
More CVEs In Apache Tomcat.
- CVE-2026-34486CriticalKnown exploitedInformation onlyApache Tomcat Tribes EncryptInterceptor Bypass - Remote Code ExecutionApacheCVSS9.8
- CVE-2019-0232HighApache Tomcat `CGIServlet` enableCmdLineArguments - Remote Code ExecutionApacheCVSS8.1
- CVE-2000-0760MediumJakarta Tomcat 3.1 and 3.0 - Information DisclosureApacheCVSS6.4
- CVE-2026-50229MediumInformation onlyApache Tomcat - Cross-Site ScriptingApacheCVSS—
FAQ
Common Questions.
Apache Tomcat - HTTP Request Smuggling. Apache Tomcat from versions 8.5.0 to 8.5.93, 9.0.0-M1 to 9.0.81, 10.1.0-M1 to 10.1.13, and 11.0.0-M1 to 11.0.0-M11 contain an improper input validation caused by incorrect parsing of HTTP trailer headers, letting attackers craft headers to cause request smuggling, exploit requires sending malicious trailer headers.
Atlas sends up to 1 read-only request to your site and looks for the specific sign of CVE-2023-45648 in Apache Tomcat. Nothing is changed, uploaded or stored on your site.
CVE-2023-45648 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing. Its CVSS score is 5.3.
Yes. The check only reads public pages, the same way a browser or a search engine would. Scan only sites you own or are allowed to test.
It means no sign of CVE-2023-45648 was found by this read-only check. It does not prove the site is free of other weaknesses.
Update Apache Tomcat to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. The vendor links and details are in the CVE-2023-45648 briefing linked on this page.
Scan only sites you own or have written permission to test. A result of Not Vulnerable means this read-only check found no sign of CVE-2023-45648; it is not a guarantee that the site is secure.