CVE-2026-111768

HIGHPre-NVD 7.57.5
EchelonGraph scoreHIGH confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-10-20. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-117803 (ENISA EUVD) · GHSA-46jr-4wx8-v453 (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The Model Context Protocol TypeScript SDK provides TypeScript client and server implementations of the Model Context Protocol. From 1.3.0 until 1.32.0 in @modelcontextprotocol/sdk and from 2.0.0 until 2.3.0 in @modelcontextprotocol/server, HTTP servers did not enforce a limit on the number of array elements and object keys validated in one request. The affected surface is validation of HTTP requests containing arrays or object keys. The trigger is an array-element or object-key validation workload large enough to exhaust memory while remaining within the request size limit. A single request within the default 4 MiB limit can terminate the process with JavaScript heap exhaustion. No credentials are required unless the application authenticates before SDK processing. Tools accepting arrays or records carry the greatest risk. stdio-only servers do not expose the HTTP request path. Upgrading alone does not enable the new validation bound. Operators must configure both a tool-input element bound and an appropriate request body size limit. This issue is fixed in @modelcontextprotocol/sdk 1.32.0 and @modelcontextprotocol/server 2.3.0.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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
49th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

October 20, 2026

Last Modified

November 12, 2026

Advisory Details (6)

Auto-updated Nov 5, 2026
Patch available. Sources: github, github_commit, github_pr, github_release.
GitHub release Patch Available

1.32.0

Patch available: modelcontextprotocol/typescript-sdk 1.32.0

https://github.com/modelcontextprotocol/typescript-sdk/releases/tag/1.32.0
GitHub commit Patch Available

commit fd26801b3b38 (modelcontextprotocol/typescript-sdk)

Patch available: modelcontextprotocol/typescript-sdk 1.32.0 (contains commit fd26801b3b38)

https://github.com/modelcontextprotocol/typescript-sdk/commit/fd26801b3b387742fe24a90ed4b275dd6072209f
GitHub commit Patch Available

commit 6d8dbc6cb590 (modelcontextprotocol/typescript-sdk)

Patch available: modelcontextprotocol/typescript-sdk @modelcontextprotocol/[email protected] (contains commit 6d8dbc6cb590)

https://github.com/modelcontextprotocol/typescript-sdk/commit/6d8dbc6cb590edf766fcb66b636ca6b654e99c37
GitHub pull request Patch Available

[v1.x] feat(server): add maxToolInputElements option to limit the number of elements in tool-call arguments

Patch available: modelcontextprotocol/typescript-sdk 1.32.0 (PR #2927 merged 2026-10-02)

https://github.com/modelcontextprotocol/typescript-sdk/pull/2927
GitHub pull request Patch Available

feat(server): add maxToolInputElements option to limit the number of elements in tool-call arguments

Patch available: modelcontextprotocol/typescript-sdk @modelcontextprotocol/[email protected] (PR #2926 merged 2026-10-02)

https://github.com/modelcontextprotocol/typescript-sdk/pull/2926
GitHub advisoryMentions a patch (unverified)

One HTTP request within the default size limit could exhaust server memory during validation · Advisory · modelcontextprotocol/typescript-sdk · GitHub

https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-46jr-4wx8-v453

Vendor Advisories for CVE-2026-111768(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npm@modelcontextprotocol/sdk @ 1.32.0 (fixes >= 1.3.0, < 1.32.0)—ghsa
npm@modelcontextprotocol/server @ 2.3.0 (fixes >= 2.0.0, < 2.3.0)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFix by version rangeDependents
@modelcontextprotocol/sdk—
  • 1.3.0 up to 1.32.0: fixed in 1.32.0
—
@modelcontextprotocol/server—
  • 2.0.0 up to 2.3.0: fixed in 2.3.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 16× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  2. 2026-11-12 22:28 UTCEchelonGraph re-scored
  3. 2026-11-12 22:28 UTCGHSA enrichmentGHSA-46jr-4wx8-v453 · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  5. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  6. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  7. 2026-11-09 18:27 UTCEchelonGraph re-scored
  8. 2026-11-09 18:27 UTCGHSA enrichmentGHSA-46jr-4wx8-v453 · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-11-09 17:45 UTCEchelonGraph re-scored
  10. 2026-11-09 17:45 UTCGHSA enrichmentGHSA-46jr-4wx8-v453 · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  12. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  13. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  14. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-11-05 22:28 UTCEchelonGraph re-scored
  16. 2026-11-05 22:28 UTCGHSA enrichmentGHSA-46jr-4wx8-v453 · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-11-05 22:12 UTCENISA EUVD ID recordedEUVD-2026-117803 · Source: ENISA EUVD
  18. 2026-11-05 21:28 UTCGHSA enrichmentGHSA-46jr-4wx8-v453 · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-11-05 07:21 UTCGHSA enrichmentGHSA-46jr-4wx8-v453 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-11-01 07:59 UTCGHSA enrichmentGHSA-46jr-4wx8-v453 · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-11-01 07:59 UTCEchelonGraph re-scored
  22. 2026-10-25 14:52 UTCEchelonGraph re-scored
  23. 2026-10-20 20:20 UTCEchelonGraph re-scoredFirst assessed: 7.5 HIGH

Frequently asked(5)

What is CVE-2026-111768?
CVE-2026-111768 is a high-severity vulnerability; its CVE record was published on October 20, 2026. The Model Context Protocol TypeScript SDK provides TypeScript client and server implementations of the Model Context Protocol. From 1.3.0 until 1.32.0 in @modelcontextprotocol/sdk and from 2.0.0 until 2.3.0 in @modelcontextprotocol/server, HTTP servers did not enforce a limit on the number of array…
When was the CVE record for CVE-2026-111768 published?
The CVE record for CVE-2026-111768 was published on October 20, 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 November 12, 2026; the record at its source may have been updated since.
Is CVE-2026-111768 actively exploited?
CVE-2026-111768 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (49th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-111768?
CVE-2026-111768 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-111768?
A fix for CVE-2026-111768 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-111768 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-111768

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