CVE-2026-109823

Description

An attacker can read the name of filesystem paths of your application present via Tidewave configuration via /tidewave/connect or via the rendered toolbar. Neither response checks the Host header. A web page that rebinds its own domain to the loopback address can therefore read the tag with a same-origin request, which carries no Origin header. The paths usually reveal the local username and the project layout. This issue affects tidewave: from 0.8.0 before 0.9.2.

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Weakness Type (CWE)

CWE-497 CWE-497

References

Other References

https://cna.erlef.org/cves/CVE-2026-109823.html https://github.com/tidewave-ai/tidewave_phoenix/commit/80159536f752dc4d34797934d1516f29cea12b50 https://github.com/tidewave-ai/tidewave_phoenix/commit/f78352b56d19cd4ae49999aa385011cef73e8b93 https://osv.dev/vulnerability/EEF-CVE-2026-109823

Frequently Asked Questions

What is CVE-2026-109823? +

An attacker can read the name of filesystem paths of your application present via Tidewave configuration via /tidewave/connect or via the rendered toolbar. Neither response checks the Host header. A web page that rebinds its own domain to the loopback address can therefore read the tag with a same-origin request, which carries no Origin header. The paths usually reveal the local username and the project layout. This issue affects tidewave: from 0.8.0 before 0.9.2.

How do I check if I'm vulnerable to CVE-2026-109823? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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