---
id: CVE-2026-122140
title: Trawl 1.5.0 before 1.10.0 SSRF via IPv4-mapped IPv6 MCP Policy Bypass
summary: >-
  Trawl 1.5.0 before 1.10.0 contains a server-side request forgery vulnerability
  that allows unauthenticated attackers to bypass the MCP outbound URL policy
  using IPv4-mapped IPv6 addresses. Attackers can supply hex-normalized
  addresses li…
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: germondai
product: trawl
affected:
  - trawl >= 1.5.0 < 1.10.0
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T20:36:57.196Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-122140'
references:
  - url: 'https://github.com/germondai/trawl/security/advisories/GHSA-mj45-84p2-v77q'
    label: GitHub Security Advisory (GHSA-mj45-84p2-v77q)
  - url: >-
      https://github.com/germondai/trawl/commit/17cdb33a9a6a8200cf8f9fd6a57b295b04ee5173
  - url: 'https://github.com/germondai/trawl/pull/263'
  - url: 'https://github.com/germondai/trawl/releases/tag/v1.10.0'
    label: trawl v1.10.0 Release Notes
  - url: >-
      https://github.com/germondai/trawl/blob/v1.9.3/apps/api/src/outbound-policy.ts#L55-L56
  - url: >-
      https://www.vulncheck.com/advisories/trawl-1.5.0-before-1.10.0-ssrf-via-ipv4-mapped-ipv6-mcp-policy-bypass
    label: >-
      VulnCheck Advisory: Trawl 1.5.0 before 1.10.0 SSRF via IPv4-mapped IPv6
      MCP Policy Bypass
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.563Z'
epss: 0.0035
epssPercentile: 0.28796
---

## Overview

Trawl 1.5.0 before 1.10.0 contains a server-side request forgery vulnerability that allows unauthenticated attackers to bypass the MCP outbound URL policy using IPv4-mapped IPv6 addresses. Attackers can supply hex-normalized addresses like ::ffff:7f00:1 directly or via redirects to fetch loopback, private, and cloud metadata services and read responses.

## Affected

- `trawl >= 1.5.0 < 1.10.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.