CVE-2026-59971

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. 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: epss, secondary
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

MySQL MCP Server is a Model Context Protocol server that enables secure interaction with MySQL databases. Prior to 0.4.2, setting MCP_TRANSPORT=sse causes src/mysql_mcp_server/server.py to construct SseServerTransport without security_settings or enable_dns_rebinding_protection, while the Starlette routes /, /sse, and /messages/ have no authentication and the service binds to 0.0.0.0 by default. A network attacker can directly reach execute_sql, or can use DNS rebinding to make a victim's browser relay same-origin requests to a locally bound service, and supply a query that reaches cursor.execute(query). This allows unauthenticated disclosure and modification of the configured database; when the MySQL account has FILE privileges, the same access can read or write server files and may enable code execution. The default stdio transport is not affected. This issue is fixed in 0.4.2.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 15, 2026

Advisory Details (4)

Auto-updated Sep 15, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Missing Origin/Host Validation in SSE Transport Enables Unauthenticated SQL Execution (DNS Rebinding / Direct Exposure) · Advisory · designcomputer/mysql_mcp_server · GitHub

https://github.com/designcomputer/mysql_mcp_server/security/advisories/GHSA-rqfv-2mw9-78g2
github_release Patch Available

v0.4.2

Patch available: designcomputer/mysql_mcp_server v0.4.2

https://github.com/designcomputer/mysql_mcp_server/releases/tag/v0.4.2
generic

Missing Origin/Host Validation in SSE Transport Enables Unauthenticated `execute_sql` (DNS Rebinding / Direct Exposure → Full Database Compromise) · Issue #92 · designcomputer/mysql_mcp_server · GitHub

https://github.com/designcomputer/mysql_mcp_server/issues/92
github_commit Patch Available

commit a96549f4a4d6 (designcomputer/mysql_mcp_server)

Patch available: designcomputer/mysql_mcp_server v0.4.2 (contains commit a96549f4a4d6)

https://github.com/designcomputer/mysql_mcp_server/commit/a96549f4a4d65443fd6e9c7f2324fba9a5c80a82

Vendor Advisories for CVE-2026-59971(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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
mysql-mcp-server0.1.0 ... 0.4.1 (9 versions)0.4.2—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 10× 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. 2026-09-19 16:02 UTCEG score recompute
  2. 2026-09-18 20:12 UTCEG score recompute
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 19:37 UTCEG score recompute
  5. 2026-09-17 19:31 UTCEPSS rescore
  6. 2026-09-16 17:59 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-15 16:34 UTCEG score recompute
  9. 2026-09-15 15:25 UTCEG score recompute
  10. 2026-09-11 21:24 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-59971?
CVE-2026-59971 is a critical vulnerability published on September 11, 2026. MySQL MCP Server is a Model Context Protocol server that enables secure interaction with MySQL databases. Prior to 0.4.2, setting MCPTRANSPORT=sse causes src/mysqlmcpserver/server.py to construct SseServerTransport without securitysettings or enablednsrebindingprotection, while the Starlette routes…
When was CVE-2026-59971 disclosed?
CVE-2026-59971 was first published in the National Vulnerability Database on September 11, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59971 actively exploited?
CVE-2026-59971 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.1% of all scored CVEs.
What is the CVSS score of CVE-2026-59971?
CVE-2026-59971 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-59971?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59971, 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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