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CVE-2026-85297

Bucket Squatting in Cloud Run MCP leads to Service Account Takeover

Products / packages Google Cloud Cloud Run MCP

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 05/11/2026, 08:10:31 UTC
GoogleCloud · CVSS:4.0 · 7.7
Assessment vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/U:Amber

Severity

high7.7

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Source guidance available

Review the recorded instructions. Guidance may be a workaround rather than a fixed version.

What this means

Google Cloud Run MCP versions prior to 1.11.0 are affected by Bucket Squatting, allowing an attacker to access source code and data. The weakness is due to predictable numbers or identifiers generation. Users must upgrade to version 1.11.0 or later.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Google Cloud · GoogleCloud

Cloud Run MCP

1 range
GoogleCloud version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 1.11.0

custom versions

unaffected

unknown

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

Users must upgrade to Cloud Run MCP version 1.11.0 or later.

GoogleCloud guidance ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Bucket Squatting in Google Cloud Run MCP versions prior to 1.11.0 on Google Cloud Platform allows an attacker to intercept and access proprietary source code, execute arbitrary code and exfiltrate data.

Users must upgrade to Cloud Run MCP version 1.11.0 or later.

References

1 sources
GoogleCloudPlatform/cloud-run-mcp · releases/tag/v1.11.0
Release notesGoogleCloud

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-85297

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-340 ↗

CWE-340 Generation of Predictable Numbers or Identifiers

GoogleCloud

Related →
Contributing organizations · 2
GoogleCloud

Assigning organization

2026-10-26
CISA-ADP

Additional data publisher

2026-11-02

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-85297

    Observed 2026-11-02T21:21:02.688Z · upstream updated 2026-11-02T21:12:52.542Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-02T21:12:44.146375Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.