Vulnerability · Published Oct 27, 2026 · Assigned by EEF

CVE-2026-109823Host filesystem path disclosure via DNS rebinding

Low 2.3

In plain English

A low-severity security flaw in tidewave from tidewave-ai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 4.0)2.3Low

Exploit odds (30 days)0.4%top 69.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
tidewave-ai	tidewave	0.8.0 – before 0.9.2
tidewave-ai	tidewave	f78352b56d19cd4ae49999aa385011cef73e8b93 – before 80159536f752dc4d34797934d1516f29cea12b50

Weakness: CWE-497 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References

EEF CNA record for CVE-2026-109823 related, third-party-advisory
OSV record EEF-CVE-2026-109823 related
Introducing commit f78352b in tidewave-ai/tidewave_phoenix related
Fix commit 8015953 in tidewave-ai/tidewave_phoenix patch