Skip to content
Heist/ feed
Back to feed
High

Nightingale 9.1.1 SSRF Guard Bypass via IPv6 Encoding

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-85692
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 09:56 UTC · Revision 1

Source evidence

Nightingale 9.1.1 SSRF Guard Bypass via IPv6 Encoding

core-osv · Original source

Published 4 Sept 2026, 14:32 UTC

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.

osv:CVE-2026-85692
Complete source record
{
  "id": "2045a8fc0a0c3f6d99659d6934e9ab1e26828f3b64b830f953604b16a8152ece",
  "url": "https://osv.dev/vulnerability/CVE-2026-85692",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nightingale 9.1.1 SSRF Guard Bypass via IPv6 Encoding",
    "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 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.",
    "evidence": "osv:CVE-2026-85692",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-85692",
      "aliases": [
        "CVE-2026-85692"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ccfos/nightingale",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "4e056150142b2e1ed6966c9317a9e08442c399f7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "9.1.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v9.1.1",
            "v9.1.0",
            "v9.0.0",
            "v9.0.0-beta.4-test",
            "v9.0.0-beta.4",
            "v9.0.0-beta.3",
            "v9.0.0-beta.2",
            "v9.0.0-beta.1",
            "v8.5.1",
            "v8.5.0",
            "v8.3.1",
            "v8.3.0",
            "v8.2.2",
            "v8.2.1",
            "v8.2.0",
            "v8.1.0",
            "v8.0.0",
            "v8.0.0-beta.14",
            "v8.0.0-beta.13",
            "v8.0.0-beta.12",
            "v8.0.0-beta.11",
            "v8.0.0-beta.10",
            "v8.0.0-beta.9",
            "v8.0.0-beta.8.2",
            "v8.0.0-beta.8.1",
            "v8.0.0-beta.8",
            "v8.0.0-beta.7",
            "v8.0.0-beta.6",
            "v8.0.0-beta.5",
            "v8.0.0-beta.4",
            "v8.0.0-beta.3",
            "v8.0.0-beta.2",
            "v8.0.0-beta.1",
            "v7.7.1",
            "v7.6.0",
            "v7.5.0",
            "v7.4.1",
            "v7.4.0",
            "v7.3.3",
            "v7.3.2",
            "v7.3.1",
            "v7.3.0",
            "v7.2.1",
            "v7.2.0",
            "v7.1.0",
            "v7.0.0",
            "v7.0.0-beta.14.1",
            "v7.0.0-beta.14",
            "v7.0.0-beta.14.3",
            "v7.0.0-beta.14.2",
            "v7.0.0-beta.13",
            "v7.0.0-beta.12",
            "v7.0.0-beta.12.1",
            "v7.0.0-beta.10",
            "v7.0.0-beta.9",
            "v7.0.0-beta.8",
            "v7.0.0-beta.7",
            "v7.0.0-beta.5",
            "v7.0.0-beta.3",
            "v7.0.0-beta.2.0.1",
            "v7.0.0-beta.2",
            "v7.0.0-beta.0",
            "v6.7.2",
            "v6.7.1",
            "v6.7.0",
            "v6.6.1",
            "v6.6.0",
            "v6.5.0",
            "v6.4.0",
            "v6.3.4",
            "v6.3.3",
            "v6.3.2",
            "v6.3.1",
            "v6.3.0",
            "v6.0.3",
            "v6.0.2",
            "v6.0.0",
            "v6.0.0-ga.14",
            "v6.0.0-ga.14-pre",
            "v6.0.0-ga.13",
            "v6.0.0-ga.12",
            "v6.0.0-ga.11",
            "v6.0.0-ga.10",
            "v6.0.0-ga.9",
            "v6.0.0-ga.8",
            "v6.0.0-ga.7.0.2",
            "v6.0.0-ga.7.0.1",
            "v6.0.0-ga.7",
            "v6.0.0-ga.6",
            "v6.0.0-ga.5",
            "v6.0.0-ga.4.1",
            "v6.0.0-ga.4.0.1",
            "v6.0.0-ga.4",
            "v6.0.0-ga.3",
            "v6.0.0-ga.2",
            "v6.0.0-ga.1",
            "v6.0.0-beta.5",
            "v6.0.0-beta.4",
            "v6.0.0-beta.3",
            "v6.0.0-beta.2",
            "v6.0.0-beta.1",
            "v6.0.0-beta.0",
            "v5.15.0",
            "v5.14.5",
            "v5.14.4",
            "v5.14.3",
            "v5.14.2",
            "v5.14.1",
            "v5.14.0",
            "v5.13.1",
            "v5.13.0",
            "v5.12.1",
            "v5.12.0",
            "v5.11.3",
            "v5.11.2",
            "v5.11.1",
            "v5.11.0",
            "v5.10.3",
            "v5.10.2",
            "v5.10.1",
            "v5.10.0",
            "v5.9.7",
            "v5.9.6",
            "v5.9.5",
            "v5.9.4",
            "v5.9.3",
            "v5.9.2",
            "v5.8.0",
            "v5.7.0",
            "v5.6.3",
            "v5.6.2",
            "v5.6.1",
            "v5.6.0",
            "v3.8.0",
            "v5.5.0",
            "v5.4.0",
            "v5.3.4",
            "v5.3.3",
            "v5.3.2",
            "v5.3.1",
            "v5.3.0",
            "v5.2.3",
            "v5.2.2",
            "v5.2.0",
            "v5.1.0",
            "v5.0.0-ga-06",
            "v5.0.0-ga-05",
            "v5.0.0-ga-04",
            "v5.0.0-ga-02",
            "v5.0.0-rc7",
            "v4.0.3",
            "v4.0.2",
            "v4.0.0",
            "v3.7.1",
            "v3.7.0",
            "v3.6.0",
            "v3.5.2",
            "v3.5.1",
            "v3.5.0",
            "v3.4.1",
            "v3.4.0",
            "v3.3.1",
            "v3.3.0",
            "v3.1.6",
            "v3.1.4",
            "v2.8.0",
            "v2.7.2",
            "v2.7.1",
            "v2.7.0",
            "v2.0.0",
            "v1.4.0",
            "v2.4.2",
            "v2.2.2",
            "V2.2.1",
            "v2.2.0",
            "V2.1.0",
            "V1.4.1",
            "v1.3.3",
            "V1.3.2",
            "V1.3.1",
            "v1.3.0",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.0",
            "v1.1.0",
            "v1.0.3",
            "v1.0.2",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85692.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.874262660Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85692.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-85692",
        "https://www.vulncheck.com/advisories/nightingale-9.1.1-ssrf-guard-bypass-via-ipv6-encoding",
        "https://github.com/ccfos/nightingale/issues/3363",
        "https://github.com/ccfos/nightingale",
        "https://github.com/ccfos/nightingale/blob/v9.1.1/aiagent/tools/http.go"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85692.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-85692",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494359,
  "published_at": "2026-09-04T14:32:36.023+00:00"
}