High
Flowise: SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses
Type: advisorySources: OSV
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, Flowise's HTTP security module httpSecurity.ts did not normalize IPv4-mapped IPv6 addresses such as ::ffff:127.0.0.1 and ::ffff:169.254.169.254 before checking them against the deny list. Because ipaddr.js reports these addresses as ipv6 while IPv4 CIDR deny-list entries are ipv4, isDeniedIP() skipped the IPv4 CIDR checks. An attacker who controls DNS resolution for a hostname used by the HTTP Node, API Chain, Document Loader, MCP tool, or other paths using secureAxiosRequest(), secureFetch(), or checkDenyList() could return a AAAA record for an IPv4-mapped target and cause requests to reach localhost, internal services, or cloud metadata endpoints. This issue is fixed in version 3.1.3.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-69257
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 07:02 UTC · Revision 1
Source evidence
Flowise: SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses
core-osv · Original sourcePublished 4 Aug 2026, 15:51 UTC
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, Flowise's HTTP security module httpSecurity.ts did not normalize IPv4-mapped IPv6 addresses such as ::ffff:127.0.0.1 and ::ffff:169.254.169.254 before checking them against the deny list. Because ipaddr.js reports these addresses as ipv6 while IPv4 CIDR deny-list entries are ipv4, isDeniedIP() skipped the IPv4 CIDR checks. An attacker who controls DNS resolution for a hostname used by the HTTP Node, API Chain, Document Loader, MCP tool, or other paths using secureAxiosRequest(), secureFetch(), or checkDenyList() could return a AAAA record for an IPv4-mapped target and cause requests to reach localhost, internal services, or cloud metadata endpoints. This issue is fixed in version 3.1.3.
osv:CVE-2026-69257
Complete source record
{
"id": "d44407e399bbe0fb2b6e045cee6794941b581495b122b9994c0f667f1411e375",
"url": "https://osv.dev/vulnerability/CVE-2026-69257",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Flowise: SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses",
"summary": "Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, Flowise's HTTP security module httpSecurity.ts did not normalize IPv4-mapped IPv6 addresses such as ::ffff:127.0.0.1 and ::ffff:169.254.169.254 before checking them against the deny list. Because ipaddr.js reports these addresses as ipv6 while IPv4 CIDR deny-list entries are ipv4, isDeniedIP() skipped the IPv4 CIDR checks. An attacker who controls DNS resolution for a hostname used by the HTTP Node, API Chain, Document Loader, MCP tool, or other paths using secureAxiosRequest(), secureFetch(), or checkDenyList() could return a AAAA record for an IPv4-mapped target and cause requests to reach localhost, internal services, or cloud metadata endpoints. This issue is fixed in version 3.1.3.",
"evidence": "osv:CVE-2026-69257",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-69257",
"aliases": [
"CVE-2026-69257",
"GHSA-c6xh-wv4j-ppv5"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/flowiseai/flowise",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "09f099dbfda179e439ec677d06ad737375899eef"
},
{
"fixed": "0fc769208395641c1411ccdb9c81416e54802155"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.1.3"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "0fc769208395641c1411ccdb9c81416e54802155"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "09f099dbfda179e439ec677d06ad737375899eef"
}
],
"source": "REFERENCES_TAG",
"original_tag": "flowise@3.1.3"
}
]
}
}
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-69257.json"
}
}
],
"modified": "2026-10-28T02:30:50.035720933Z",
"provider": "osv",
"references": [
"https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69257.json",
"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5",
"https://nvd.nist.gov/vuln/detail/CVE-2026-69257",
"https://github.com/FlowiseAI/Flowise/commit/0fc769208395641c1411ccdb9c81416e54802155",
"https://github.com/FlowiseAI/Flowise/pull/6431"
],
"provider_metadata": {
"cwe_ids": [
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"CWE-918"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69257.json"
}
},
"related_cves": [
{
"value": "CVE-2026-69257",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 518583,
"published_at": "2026-08-04T15:51:47.7+00:00"
}