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CVE-2026-88755

Status: DeferredHigh (7.8)—
Severity7.8High · CVSS 3.1
Exploitation probability0.21 %higher than 11% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Z.ai ZCode v3.11.2.6792 was discovered to automatically establish connections with MCP servers declared inside a repository's workspace configuration, possibly allowing attackers to execute arbitrary code via opening a crafted repository.

CVSS

Base score
7.8
Version
3.1
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.21 %
Percentile among all scored CVEs
11
Score date
10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

El vector AV:L/UI:R exige abrir un repositorio manipulado; el texto indica ejecución arbitraria de código al conectar servidores MCP declarados en el workspace.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Restrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or Program

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Z.ai — ZcodeAI

CWEs

References

Show 4 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-88755",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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            },
            {
              "automatable": "no"
            },
            {
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          ],
          "version": "2.0.3",
          "timestamp": "2026-10-16T19:06:22.170802Z"
        }
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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  "affected": [
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      "affectedData": [
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  "published": "2026-10-16T15:17:33.537",
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    {
      "url": "http://zai.com",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://zcode.com",
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    {
      "url": "https://gist.github.com/lkloliver/aac8dcf8a53fc4b3c1b0a5dfbf36ef68",
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          "value": "CWE-284"
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        {
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          "value": "CWE-863"
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    {
      "lang": "en",
      "value": "Z.ai ZCode v3.11.2.6792 was discovered to automatically establish connections with MCP servers declared inside a repository's workspace configuration, possibly allowing attackers to execute arbitrary code via opening a crafted repository."
    }
  ],
  "lastModified": "2026-10-16T20:18:12.557",
  "sourceIdentifier": "cve@mitre.org"
}