CVE-2026-54561

MEDIUMPre-NVD 6.26.2
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.2 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:github_m
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 6.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

mcp-memory-keeper: Arbitrary local file read in context_import via unvalidated filePath

Impact

context_import passed the caller-supplied filePath directly to fs.readFileSync with no path confinement. A malicious MCP client — or an LLM agent that is prompt-injected into calling the tool — could point filePath at any file readable by the server process, outside any session or export directory:

  • Full disclosure (JSON files): a valid-JSON target (e.g. another user's exported session, or a *.json credential / service-account file) is parsed and imported into the caller's session, then retrievable verbatim via context_get / context_export.
  • Partial disclosure (any file): for a non-JSON target (e.g. /etc/passwd, an SSH key, a .env), JSON.parse throws and V8 includes a snippet of the file's leading bytes in the SyntaxError message, which was returned verbatim to the caller.

Both ../ traversal and absolute paths worked — there was no path confinement of any kind.

In a typical MCP deployment the server runs on the developer's machine, so the reachable set includes other users' exported memory sessions, JSON credential/config files, and (in leading-bytes form) .env files, SSH keys, and /etc/passwd. The trigger is a tool argument, so the realistic threat model is an LLM agent prompt-injected into calling context_import, or any MCP client connected to the server.

Patches

Fixed in 0.13.0 (PR #36):

  • Imports are confined to a server-owned exports directory (/exports, overridable via MEMORY_KEEPER_EXPORT_DIR), resolved with realpathSync. ../ traversal, absolute paths outside the directory, and symlink escapes are all rejected.
  • File read and JSON.parse are separate operations; read/parse failures return a generic message and never echo file bytes (the SyntaxError-message leak is gone). The database-write path is likewise generic.
  • An E2E security regression suite covers the reported arbitrary-read and traversal vectors, plus symlink escape, the directory-prefix boundary, and a no-existence-oracle check.

Workarounds

Upgrade to >= 0.13.0. There is no configuration-only workaround for affected versions.

Resources

  • Report: GitHub issue #35
  • Fix: PR #36

Credit

Reported by Zhihao Zhang (@mcfly-zzh).

CVSS v3
6.2
EG Score
6.2(low)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity62% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

July 17, 2026

Last Modified

July 17, 2026

Vendor Advisories for CVE-2026-54561(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
mcp-memory-keeper—0.13.0—

Data Freshness Timeline

(refreshed 2× in last 7d / 3× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-26 11:17 UTCEG score recompute
  2. 2026-07-23 03:19 UTCEG score recompute
  3. 2026-07-17 20:00 UTCEG score recompute

Frequently asked(4)

What is CVE-2026-54561?
CVE-2026-54561 is a medium vulnerability published on July 17, 2026. mcp-memory-keeper: Arbitrary local file read in context_import via unvalidated filePath Impact context_import passed the caller-supplied filePath directly to fs.readFileSync with no path confinement. A malicious MCP client — or an LLM agent that is prompt-injected into calling the tool — could…
When was CVE-2026-54561 disclosed?
CVE-2026-54561 was first published in the National Vulnerability Database on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-54561?
CVE-2026-54561 has a CVSS v4.0 base score of 6.2 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-54561?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54561, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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