---
id: CVE-2026-85692
title: >-
  Nightingale (n9e), as of commit 8362cbe (main branch, confirmed 2026-08-27),
  contains a server-side request forgery vulnerability in the isPublicIP
  function in aiagent/tools/http.go, the SSRF guard for the http_fetch AI-agent
  tool
summary: >-
  Nightingale (n9e), as of commit 8362cbe (main branch, confirmed 2026-08-27),
  contains a server-side request forgery vulnerability in the isPublicIP
  function in aiagent/tools/http.go, the SSRF guard for the http_fetch AI-agent
  tool. The f…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-918
published: '2026-09-04'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T15:53:23.707'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85692'
references:
  - url: 'https://github.com/ccfos/nightingale'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ccfos/nightingale/blob/v9.1.1/aiagent/tools/http.go'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ccfos/nightingale/issues/3363'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/nightingale-9.1.1-ssrf-guard-bypass-via-ipv6-encoding
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ccfos/nightingale/issues/3363'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00436
epssPercentile: 0.35163
ingestedAt: '2026-09-10T16:57:28.706Z'
---

## Overview

Nightingale (n9e), as of commit 8362cbe (main branch, confirmed 2026-08-27), contains a server-side request forgery vulnerability in the isPublicIP function in aiagent/tools/http.go, the SSRF guard for the http_fetch AI-agent tool. The function only unwraps standard IPv4-mapped (::ffff:a.b.c.d) IPv6 addresses before checking them against the forbidden-range list, and does not classify 6to4 (2002::/16), NAT64 (64:ff9b::/96, 64:ff9b:1::/48), or deprecated site-local (fec0::/10) addresses. On a dual-stack or NAT64-enabled host, an attacker able to supply a URL to the http_fetch tool can bypass the guard by encoding a forbidden IPv4 address (such as the cloud instance-metadata endpoint 169.254.169.254) in one of these IPv6 forms to reach internal or metadata services.

## Remediation

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