CVE-2026-50027 json
mcp-memory-service: Missing Authentication on Document API Endpoints Allows Unauthenticated Memory Read/Write/Delete
published 4mo ago modified last mo. also EUVD-2026-58788 , GHSA-84hp-mqvj-3p8h , PYSEC-2026-2624
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
mcp-memory-service is a semantic memory layer for AI applications. Prior to 10.67.1, all HTTP routes under /api/documents/* in mcp-memory-service are served without any authentication dependency, even when the server is configured with an API key (MCP_API_KEY) or OAuth. An unauthenticated remote attacker can upload arbitrary content into the memory store (write), retrieve stored document content (read), and permanently delete memories belonging to authenticated users (delete) — all without supplying any credentials. The /api/memories counterpart correctly enforces authentication, making this an inconsistent and exploitable authentication boundary. This vulnerability is fixed in 10.67.1.
Patch / fix
- pypi mcp-memory-service 10.67.1
- doobidoo mcp-memory-service 10.67.1
Is CVE-2026-50027 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2mo ago
Exploit prediction
0.96% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | mcp-memory-service | <10.67.1 |
10.67.1 |
Affected products
- doobidoo mcp-memory-service
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
- web.archive.org /web/20260508112116/https://github.com/doobidoo/mcp-memory-service
-
github.com
/advisories/GHSA-84hp-mqvj-3p8h
advisory
-
pypi.org
/project/mcp-memory-service
package
-
github.com
/doobidoo/mcp-memory-service/security/advisories/GHSA-84hp-mqvj-3p8h
web
-
github.com
/doobidoo/mcp-memory-service
package
-
nvd.nist.gov
/vuln/detail/CVE-2026-50027
advisory
Sources
- CVE List CVE-2026-50027
- GitHub Advisory GHSA-84hp-mqvj-3p8h
- NVD CVE-2026-50027
- OSV PYSEC-2026-2624
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.