CVE-2026-73087: Dozzle: SSRF guard bypass via IPv6 transition addresses (6to4/NAT64/Teredo) in webhook notification dispatcher
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Dozzleto a version that resolves this vulnerability.Fixed in 10.6.15
Event History
Frequently Asked Questions
What is the severity of CVE-2026-73087?
CVE-2026-73087 has a severity score of 47, indicating a notable risk level.
How do I fix CVE-2026-73087?
To mitigate CVE-2026-73087, upgrade Dozzle to version 10.6.16 or later where the SSRF guard has been improved.
What is the impact of CVE-2026-73087?
CVE-2026-73087 allows attackers to bypass the SSRF guard by using IPv4 addresses embedded in IPv6 formats for webhook notifications.
Which software is affected by CVE-2026-73087?
CVE-2026-73087 affects Dozzle versions from 10.5.2 up to 10.6.15.
What type of vulnerability is CVE-2026-73087 classified as?
CVE-2026-73087 is classified as a Server-Side Request Forgery (SSRF) vulnerability.