Vulnerability in mcp-memory-service (CVE-2026-33010)
Summary
Vulnerability in mcp-memory-service (CVE-2026-33010). Confidential information can be exposed externally. Exploitable via Origin. Mitigation: upgrade to 10.25.1 or later.
Original description
The description as published by the source.
Summary
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.
Details
Vulnerable Code
config.py:546 - Wildcard CORS origin default
CORS_ORIGINS = os.getenv('MCP_CORS_ORIGINS', '*').split(',')
This produces ['*'] by default, allowing any origin.
app.py:274-280 - CORSMiddleware configuration
# CORS middleware
app.add_middleware(
CORSMiddleware,
allow_origins=CORS_ORIGINS, # ['*'] by default
allow_credentials=True, # Unnecessary for anonymous access; bad practice
allow_methods=["*"],
allow_headers=["*"],
)
How the Attack Works
The wildcard CORS default means every API response includes Access-Control-Allow-Origin: *. This tells browsers to allow any website to read the response. When combined with anonymous access (no authentication required), the attack is straightforward:
// Running on https://evil.com - reads victim's memories
// No credent…
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-33010 has been found in mcp-memory-service.
Attackers can target a specific entry point like Origin over the network to misuse the product.
Confidential information can be exposed externally.
What to do: upgrade mcp-memory-service to 10.25.1 or later.
If unsure, ask your IT team or search "mcp-memory-service CVE-2026-33010" on the vendor's site.
CVE-2026-33010 (mcp-memory-service) — CWE-942
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: Origin / OPTIONS / MCP_ALLOW_ANONYMOUS_ACCESS / api_key
Patched: 10.25.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-942) exists in mcp-memory-service. Attackers reach the vulnerable code path via Origin without authentication.
Check the vendor advisory for the affected versions of mcp-memory-service. Attack surface: Origin / OPTIONS / MCP_ALLOW_ANONYMOUS_ACCESS / api_key.
Severity: ?. Confidential information can be exposed externally.
Update to 10.25.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'mcp-memory-service' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'mcp-memory-service' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
mcp-memory-serviceを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade mcp-memory-service to 10.25.1ステージング環境で 10.25.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com