Dozzle: SSRF guard bypass via IPv6 transition addresses (6to4/NAT64/Teredo) in webhook notification dispatcher
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.
Summary
Dozzle is a realtime log viewer for docker containers. From 10.5.2 until 10.6.15, the isBlockedIP SSRF guard in internal/notification/dispatcher/webhook.go, used by safeDialContext for webhook notification URLs, does not inspect IPv4 addresses embedded in 6to4, NAT64, Teredo, or IPv4-compatible IPv6 addresses, allowing an authenticated user to reach loopback or link-local targets that the guard intends to block. This issue is fixed in version 10.6.15.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 10.6.15 | 10.6.15 | Patch available | CNA |
| — | github.com/amir20/dozzle (Go) | before 1.29.1-0.20260804193351-8cf7ccd5ee04 | 1.29.1-0.20260804193351-8cf7ccd5ee04 | Patch available | GHSA-p2w3-6x73-2f6x |
- dozzle Vendoramir20 Affected before 10.6.15 Fixed in 10.6.15 Patch available CNA
- github.com/amir20/dozzle (Go) Vendor— Affected before 1.29.1-0.20260804193351-8cf7ccd5ee04 Fixed in 1.29.1-0.20260804193351-8cf7ccd5ee04 Patch available GHSA-p2w3-6x73-2f6x
Remediation
- Fix · CNA dozzle (amir20) Fixed in 10.6.15
- Fix · GHSA-p2w3-6x73-2f6x github.com/amir20/dozzle (Go) Fixed in 1.29.1-0.20260804193351-8cf7ccd5ee04 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-73087
- 2026-10-03 Alias added: GHSA-p2w3-6x73-2f6x
References
More amir20 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-2026-32844 Dozzle: Cross-Site WebSocket Hijacking (CSWSH) on exec/attach endpoints bypasses authentication CVSS 4.0HIGH 8.7
- TI-2026-44477 Dozzle label filters do not restrict container event and statistics streams CVSS 3.1MEDIUM 4.3
- TI-2024-31549 Dozzle uses unsafe hash for passwords CVSS 3.1HIGH 7.5
- TI-2026-65354 Dozzle before 11.1.2 Path Traversal via Log ZIP Download CVSS 4.0MEDIUM 4.6
Sources
- CVE-2026-73087 · CVE Program
- CVE-2026-73087 · NVD
- FIRST EPSS
- GHSA-p2w3-6x73-2f6x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences