CVE-2026-54504

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

MCP Documentation Server is a local-first document management and semantic search server for AI coding agents. From 1.13.0 until 1.13.1, the automatically started Web UI in src/server.ts calls startWebServer in src/web-server.ts with START_WEB_UI enabled by default and WEB_PORT set to 3080. startWebServer uses app.listen(PORT) without a host, which binds the unauthenticated document-management API to all interfaces rather than localhost. A network-reachable client can invoke GET /api/documents, GET /api/documents/:id, POST /api/documents, POST /api/search-all, DELETE /api/documents/:id, and GET /api/config without credentials to enumerate and read documents, search the corpus, insert or delete documents, and tamper with the MCP assistant's knowledge base. The service must be reachable from the attacker's LAN, VM network, container bridge, VPN, or another routed network, and the issue does not provide remote code execution. This issue is fixed in 1.13.1.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100

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 (value × EchelonGraph’s weight)
Severity88% × 45%
The EG Score, 8.8 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 15, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Sep 17, 2026
Patch available. Sources: github_pr, github_commit, github_release, github.
GitHub release Patch Available

v1.13.1

Patch available: andrea9293/mcp-documentation-server v1.13.1

https://github.com/andrea9293/mcp-documentation-server/releases/tag/v1.13.1
GitHub commit Patch Available

commit 37159d4e06b8 (andrea9293/mcp-documentation-server)

Patch available: andrea9293/mcp-documentation-server v1.13.1 (contains commit 37159d4e06b8)

https://github.com/andrea9293/mcp-documentation-server/commit/37159d4e06b8ee50c3645b2496e3d3f6d32c47f9
GitHub pull request Patch Available

fix: resolve npm security vulnerabilities (31 alerts fixed)

Patch available: andrea9293/mcp-documentation-server v1.13.1 (PR #20 merged 2026-06-04)

https://github.com/andrea9293/mcp-documentation-server/pull/20
GitHub advisoryMentions a patch (unverified)

Web UI API binds to all interfaces without authentication by default · Advisory · andrea9293/mcp-documentation-server · GitHub

https://github.com/andrea9293/mcp-documentation-server/security/advisories/GHSA-6f5r-5672-72j7

Vendor Advisories for CVE-2026-54504(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 rangeFix by version rangeDependents
@andrea9293/mcp-documentation-server1.13.0
  • 1.13.0 up to 1.13.1: fixed in 1.13.1
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 32× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  3. 2026-10-12 15:56 UTCEG score recompute
  4. 2026-10-11 19:39 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:18 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-09-30 18:11 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  20. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-09-28 08:40 UTCEG score recompute
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 44th percentile
Show 11 more
  1. 2026-09-24 08:45 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  3. 2026-09-23 03:12 UTCEG score recompute
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-09-17 20:18 UTCEG score recompute
  7. 2026-09-17 19:21 UTCEG score recompute
  8. 2026-07-30 16:00 UTCEG score recompute
  9. 2026-07-26 11:29 UTCEG score recompute
  10. 2026-07-23 03:19 UTCEG score recompute
  11. 2026-07-15 23:54 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54504?
CVE-2026-54504 is a high-severity vulnerability; its CVE record was published on July 15, 2026. MCP Documentation Server is a local-first document management and semantic search server for AI coding agents. From 1.13.0 until 1.13.1, the automatically started Web UI in src/server.ts calls startWebServer in src/web-server.ts with STARTWEBUI enabled by default and WEB_PORT set to 3080.…
When was the CVE record for CVE-2026-54504 published?
The CVE record for CVE-2026-54504 was published on July 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-54504 actively exploited?
CVE-2026-54504 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54504?
CVE-2026-54504 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54504?
A fix for CVE-2026-54504 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54504 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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