CVE-2026-49291Network attack vector

Read-scoped memory writes and deletion via MCP dispatch

Published Jun 19, 2026 · Updated Jun 19, 2026

Missing authorization in mcp-memory-service before 10.65.3 allows remote authenticated users to write or delete memories through MCP. The /mcp endpoint applies require_read_access globally, then sends tools/call requests to handle_tool_call without passing the authenticated identity or enforcing each tool's required scope. A valid read-scoped OAuth token is sufficient to invoke store_memory, delete_memory, and related mutating handlers, enabling unauthorized data modification or removal.

CVSS severity8.1
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in mcp-memory-service before 10.65.3 allows remote authenticated users to write or delete memories through MCP. The /mcp endpoint applies require_read_access globally, then sends tools/call requests to handle_tool_call without passing the authenticated identity or enforcing each tool's required scope. A valid read-scoped OAuth token is sufficient to invoke store_memory, delete_memory, and related mutating handlers, enabling unauthorized data modification or removal.

The record

CVE
CVE-2026-49291
Published
Jun 19, 2026
Updated
Jun 19, 2026
Vendor
doobidoo
Product
mcp-memory-service
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.65.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

doobidoo · mcp-memory-serviceversion=< 10.65.3

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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