CVE-2026-109823 json
Host filesystem path disclosure via DNS rebinding
published 13d ago modified 5d ago also EEF-CVE-2026-109823 , EUVD-2026-111085
- cvss
- 2.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- hex tidewave 0.9.2
- tidewave-ai tidewave 0.9.2
Is CVE-2026-109823 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5d ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 2.3 | 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 |
| CNA | 4.0 | 2.3 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| hex | tidewave | >=0.8.0, <0.9.2 |
0.9.2 |
Affected products
- tidewave-ai tidewave
Classification
- Weakness
-
- CWE-497 Exposure of Sensitive System Information to an Unauthorized Control Sphere
References
-
github.com
/tidewave-ai/tidewave_phoenix/commit/f78352b56d19cd4ae49999aa385011cef73e8b93
related, web
-
github.com
/tidewave-ai/tidewave_phoenix/commit/80159536f752dc4d34797934d1516f29cea12b50
patch
-
cna.erlef.org
/cves/CVE-2026-109823.html
related, third-party-advisory, web
-
osv.dev
/vulnerability/EEF-CVE-2026-109823
related
-
hex.pm
/packages/tidewave
package
Sources
- CVE List CVE-2026-109823
- NVD CVE-2026-109823
- OSV EEF-CVE-2026-109823
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.