CVE-2026-103068

validated

GHSA-456m-pwjf-fmqf ↗EUVD-2026-90845 ↗

check availablenot proven exploitable

cve.orgpublic pockev

ByteCore Stack ByteCoreStack – MCP Connector for AI Tools >= n/a, <= 1.2.2

CWE-266 Incorrect Privilege Assignment

ETK-2026-270, permanent identifier

cvss8.8cna vendorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

+5h06mTTV

58mAI analysis

Check if you are vulnerable

timeline

0 = trigger signal

trigger signal (cve.org) +0hcheck available+5h06magent stopped

+1h

+2h

+3h

+4h

description

bcs-mcp-manager versions through 1.2.2 are reported to allow a user with subscriber-level access to obtain additional privileges. Exploitation requires an existing subscriber account; the available evidence does not establish the mechanism or the final privilege level.

mitigation

Restrict use of the connector to trusted administrative users and review subscriber accounts and role assignments. Apply a vendor update when one is published; no fixed version is recorded in the advisory.

check

available

exploit

automation

deterministic

auth required

yes, low privileges

EPSS

0.23%13th percentile

agent run time

58m

cve.org record, t = 0

2026-10-01 14:34Z

Δ to public poc

–

Δ to kev

–

outcome

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

2026-10-01 14:34Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-103068

this entry in the feed

GET /api/v1/feed/CVE-2026-103068

{
  "etk_id": "ETK-2026-270",
  "cve_id": "CVE-2026-103068",
  "display_id": "CVE-2026-103068",
  "ghsa_id": "GHSA-456m-pwjf-fmqf",
  "euvd_id": "EUVD-2026-90845",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Subscriber privilege escalation in bcs-mcp-manager",
  "summary": "bcs-mcp-manager versions through 1.2.2 are reported to allow a user with subscriber-level access to obtain additional privileges. Exploitation requires an existing subscriber account; the available evidence does not establish the mechanism or the final privilege level.",
  "mitigation": "Restrict use of the connector to trusted administrative users and review subscriber accounts and role assignments. Apply a vendor update when one is published; no fixed version is recorded in the advisory.",
  "vendor": "ByteCore Stack",
  "product": "ByteCoreStack &#8211; MCP Connector for AI Tools",
  "affected": [
    {
      "affected_notes": [
        ">= n/a, <= 1.2.2"
      ],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "bcs-mcp-manager",
      "purl": null
    }
  ],
  "cwes": [
    266
  ],
  "cvss_score": 8.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0023,
  "epss_percentile": 0.1319,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 58.454172533333335,
  "t0_at": "2026-10-01T14:34:07.010000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-01T19:40:34.694513+00:00",
      "days": 0.21282042260416667,
      "is_lower_bound": false,
      "measured_at": "2026-10-01T14:34:07.010000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-01T14:34:07.010000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-01T14:34:07.010000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-103068"
    }
  }
}

published 2026-10-01 18:42Z
last change 2026-10-21 08:40Z

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