Dozzle: Cross-Site WebSocket Hijacking (CSWSH) on exec/attach endpoints bypasses authentication
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-346.
Summary
Dozzle is a realtime log viewer for docker containers. Prior to 10.5.2, he WebSocket upgrader for the /exec and /attach endpoints uses CheckOrigin: func(r *http.Request) bool { return true }, accepting upgrade requests from any origin. Combined with the JWT cookie using SameSite: Lax, this enables Cross-Site WebSocket Hijacking (CSWSH). An attacker hosting a page on a same-site origin (e.g., a sibling subdomain, or another service on localhost) can initiate a WebSocket connection to the exec endpoint that carries the victim's valid JWT cookie, gaining interactive shell access in any container the victim is authorized to access. This vulnerability is fixed in 10.5.2.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| amir20 | dozzle | before 10.5.2 | 10.5.2 | Patch available | CNA |
| — | github.com/amir20/dozzle (Go) | up to 10.5.1 | — | No fix listed | GHSA-j643-x8pv-8m67 |
- dozzle Vendoramir20 Affected before 10.5.2 Fixed in 10.5.2 Patch available CNA
- github.com/amir20/dozzle (Go) Vendor— Affected up to 10.5.1 Fixed in — No fix listed GHSA-j643-x8pv-8m67
Remediation
- Fix · CNA dozzle (amir20) Fixed in 10.5.2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44985
- 2026-10-03 Alias added: GHSA-j643-x8pv-8m67
References
More amir20 Dozzle vulnerabilities
- TI-2026-19945 Dozzle Agent Label-Based Access Control Bypass Allows Unauthorized Container Shell Access CVSS 4.0HIGH 8.7
- TI-2026-33098 Dozzle: Pre-auth SSRF with response-body reflection via POST /api/notifications/test-webhook (default no-auth deploy) CVSS 3.1HIGH 8.6
- TI-2024-31549 Dozzle uses unsafe hash for passwords CVSS 3.1HIGH 7.5
Sources
- CVE-2026-44985 · CVE Program
- CVE-2026-44985 · NVD
- FIRST EPSS
- GHSA-j643-x8pv-8m67 · GitHub Advisory Database · CC BY 4.0
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