CVE-2026-55609

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% 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
Elevated
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: Elevated riskExposed: 0

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

sublinear-time-solver is a Rust and WebAssembly library for solving asymmetric diagonally dominant systems in sublinear time. Prior to consciousness-explorer 1.1.2 and sublinear-time-solver 1.6.0, the export_state and import_state tools in src/consciousness-explorer/mcp/server.js pass the attacker-controlled filepath parameter to filesystem operations in src/consciousness-explorer/index.js without restricting the destination or rejecting traversal. The saveVectorToFile and loadVectorFromFile tools in src/mcp/server.ts contain the same sink class through the file_path parameter. An attacker able to invoke the MCP tools can read, write, or overwrite any file accessible to the server process, causing confidentiality and integrity loss and possible service disruption. This issue is fixed in consciousness-explorer 1.1.2 and sublinear-time-solver 1.6.0.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity71% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 25, 2026

Last Modified

September 9, 2026

Advisory Details (7)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available

Arbitrary file write in consciousness-explorer / sublinear-time-solver MCP export_state (CWE-73) · Advisory · ruvnet/sublinear-time-solver · GitHub

https://github.com/ruvnet/sublinear-time-solver/security/advisories/GHSA-xc9g-j69q-37xw
github_release Patch Available

v1.6.0 — security fix (#19 CWE-73), solver correctness, full CI

Patch available: ruvnet/sublinear-time-solver v1.6.0

https://github.com/ruvnet/sublinear-time-solver/releases/tag/v1.6.0
github_pr Patch Available

security: fix #19 (CWE-73 path traversal) + extend to main MCP server

Patch available: ruvnet/sublinear-time-solver v1.6.0 (PR #20 merged 2026-05-18)

https://github.com/ruvnet/sublinear-time-solver/pull/20
generic🟡 PoC Available

Arbitrary File Write Vulnerability in consciousness-explorer of sublinear-time-solver · Issue #19 · ruvnet/sublinear-time-solver · GitHub

https://github.com/ruvnet/sublinear-time-solver/issues/19
github_commit Patch Available

commit ea9a212b69e4 (ruvnet/sublinear-time-solver)

Patch available: ruvnet/sublinear-time-solver v1.6.0 (contains commit ea9a212b69e4)

https://github.com/ruvnet/sublinear-time-solver/commit/ea9a212b69e4449ec443fe088a7aec7546f70b4a
github_commit Patch Available

commit a701296e3631 (ruvnet/sublinear-time-solver)

Patch available: ruvnet/sublinear-time-solver v1.6.0 (contains commit a701296e3631)

https://github.com/ruvnet/sublinear-time-solver/commit/a701296e363192be863e79d788fa268095e3d229
generic🟡 PoC Available

Arbitrary File Write Vulnerability in consciousness-explorer of sublinear-time-solver · Issue #32 · BruceJqs/public_exp · GitHub

https://github.com/BruceJqs/public_exp/issues/32

Vendor Advisories for CVE-2026-55609(1)

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

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFixed inDependents
consciousness-explorer—1.1.2—
sublinear-time-solver—1.6.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 43× 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. 2026-09-18 21:59 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 21:08 UTCEG score recompute
  4. 2026-09-17 19:31 UTCEPSS rescore
  5. 2026-09-16 15:42 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 14:40 UTCEG score recompute
  9. 2026-09-15 03:11 UTCEPSS rescore
  10. 2026-09-14 01:05 UTCEG score recompute
  11. 2026-09-13 16:47 UTCEPSS rescore
  12. 2026-09-13 00:15 UTCEG score recompute
  13. 2026-09-11 23:23 UTCEG score recompute
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 10:57 UTCEG score recompute
  16. 2026-09-10 09:39 UTCEG score recompute
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-09 01:11 UTCEG score recompute
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-08 04:25 UTCEG score recompute
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-06 15:02 UTCEG score recompute
  23. 2026-09-06 13:47 UTCEPSS rescore
  24. 2026-09-05 01:43 UTCEG score recompute
  25. 2026-09-04 13:18 UTCEG score recompute
Show 18 more
  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-01 22:57 UTCEG score recompute
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 10:32 UTCEG score recompute
  5. 2026-09-01 04:40 UTCEPSS rescore
  6. 2026-08-30 21:10 UTCEG score recompute
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 08:44 UTCEG score recompute
  9. 2026-08-30 01:22 UTCEPSS rescore
  10. 2026-08-29 07:52 UTCEG score recompute
  11. 2026-08-28 21:41 UTCEPSS rescore
  12. 2026-08-27 18:11 UTCEG score recompute
  13. 2026-08-27 14:25 UTCEPSS rescore
  14. 2026-08-26 16:43 UTCEG score recompute
  15. 2026-08-26 15:58 UTCEG score recompute
  16. 2026-08-26 14:46 UTCEPSS rescore
  17. 2026-08-25 19:20 UTCEG score recompute
  18. 2026-08-25 18:44 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-55609?
CVE-2026-55609 is a high vulnerability published on August 25, 2026. sublinear-time-solver is a Rust and WebAssembly library for solving asymmetric diagonally dominant systems in sublinear time. Prior to consciousness-explorer 1.1.2 and sublinear-time-solver 1.6.0, the exportstate and importstate tools in src/consciousness-explorer/mcp/server.js pass the…
When was CVE-2026-55609 disclosed?
CVE-2026-55609 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55609 actively exploited?
CVE-2026-55609 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 98.1% of all scored CVEs.
What is the CVSS score of CVE-2026-55609?
CVE-2026-55609 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-55609?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55609, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-55609

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