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Medium

stoatchat before 0.15.0 SSRF via IPv6 unspecified address bypass

Type: advisorySources: OSV

stoatchat versions before 0.15.0 fail to block the IPv6 unspecified address (::) in the SSRF blocklist, allowing unauthenticated attackers to bypass protections via the /proxy and /embed endpoints. Attackers can craft requests using IPv6 literal syntax to access services on the loopback interface and retrieve sensitive internal content.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-73058
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 02:51 UTC · Revision 1

Source evidence

stoatchat before 0.15.0 SSRF via IPv6 unspecified address bypass

core-osv · Original source

Published 16 Aug 2026, 13:14 UTC

stoatchat versions before 0.15.0 fail to block the IPv6 unspecified address (::) in the SSRF blocklist, allowing unauthenticated attackers to bypass protections via the /proxy and /embed endpoints. Attackers can craft requests using IPv6 literal syntax to access services on the loopback interface and retrieve sensitive internal content.

osv:CVE-2026-73058
Complete source record
{
  "id": "e8276ab952c08d477357e2aa39c0b79d4c209ba343ae1c74fea075928e3f6e5a",
  "url": "https://osv.dev/vulnerability/CVE-2026-73058",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "stoatchat before 0.15.0 SSRF via IPv6 unspecified address bypass",
    "summary": "stoatchat versions before 0.15.0 fail to block the IPv6 unspecified address (::) in the SSRF blocklist, allowing unauthenticated attackers to bypass protections via the /proxy and /embed endpoints. Attackers can craft requests using IPv6 literal syntax to access services on the loopback interface and retrieve sensitive internal content.",
    "evidence": "osv:CVE-2026-73058",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-73058",
      "aliases": [
        "CVE-2026-73058",
        "GHSA-4rmr-77qv-hq47"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/stoatchat/stoatchat",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a1628d7dd26c2388ef38f4a53714374729dec07c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.15.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.15.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73058.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.972520261Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73058.json",
        "https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4rmr-77qv-hq47",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-73058",
        "https://www.vulncheck.com/advisories/stoatchat-before-ssrf-via-ipv6-unspecified-address-bypass"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73058.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-73058",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517508,
  "published_at": "2026-08-16T13:14:05.977+00:00"
}