High
mcp-memory-service's Wildcard CORS with Credentials Enables Cross-Origin Memory Theft
Type: advisorySources: OSV
mcp-memory-service is an open-source memory backend for multi-agent systems. Prior to version 10.25.1, when the HTTP server is enabled (MCP_HTTP_ENABLED=true), the application configures FastAPI's CORSMiddleware with allow_origins=['*'], allow_credentials=True, allow_methods=["*"], and allow_headers=["*"]. The wildcard Access-Control-Allow-Origin: * header permits any website to read API responses cross-origin. When combined with anonymous access (MCP_ALLOW_ANONYMOUS_ACCESS=true) - the simplest way to get the HTTP dashboard working without OAuth - no credentials are needed, so any malicious website can silently read, modify, and delete all stored memories. This issue has been patched in version 10.25.1.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33010
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 09:45 UTC · Revision 1
Source evidence
mcp-memory-service's Wildcard CORS with Credentials Enables Cross-Origin Memory Theft
core-osv · Original sourcePublished 20 Mar 2026, 18:33 UTC
mcp-memory-service is an open-source memory backend for multi-agent systems. Prior to version 10.25.1, when the HTTP server is enabled (MCP_HTTP_ENABLED=true), the application configures FastAPI's CORSMiddleware with allow_origins=['*'], allow_credentials=True, allow_methods=["*"], and allow_headers=["*"]. The wildcard Access-Control-Allow-Origin: * header permits any website to read API responses cross-origin. When combined with anonymous access (MCP_ALLOW_ANONYMOUS_ACCESS=true) - the simplest way to get the HTTP dashboard working without OAuth - no credentials are needed, so any malicious website can silently read, modify, and delete all stored memories. This issue has been patched in version 10.25.1.
osv:CVE-2026-33010
Complete source record
{
"id": "ae99fa78ce3ff200826bca24198104cf714c02d305fe23556047bd43ae8bd827",
"url": "https://osv.dev/vulnerability/CVE-2026-33010",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "mcp-memory-service's Wildcard CORS with Credentials Enables Cross-Origin Memory Theft",
"summary": "mcp-memory-service is an open-source memory backend for multi-agent systems. Prior to version 10.25.1, when the HTTP server is enabled (MCP_HTTP_ENABLED=true), the application configures FastAPI's CORSMiddleware with allow_origins=['*'], allow_credentials=True, allow_methods=[\"*\"], and allow_headers=[\"*\"]. The wildcard Access-Control-Allow-Origin: * header permits any website to read API responses cross-origin. When combined with anonymous access (MCP_ALLOW_ANONYMOUS_ACCESS=true) - the simplest way to get the HTTP dashboard working without OAuth - no credentials are needed, so any malicious website can silently read, modify, and delete all stored memories. This issue has been patched in version 10.25.1.",
"evidence": "osv:CVE-2026-33010",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-33010",
"aliases": [
"CVE-2026-33010",
"GHSA-g9rg-8vq5-mpwm",
"PYSEC-2026-2625"
],
"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
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"modified": "2026-10-28T02:30:27.838541734Z",
"provider": "osv",
"references": [
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"https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-g9rg-8vq5-mpwm",
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"evidence": "/id"
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},
"source_id": "core-osv",
"document_id": 494303,
"published_at": "2026-03-20T18:33:39.007+00:00"
}