01 Record
CVE-2026-85297
Bucket Squatting in Cloud Run MCP leads to Service Account Takeover
HighPUBLISHEDCNA: GoogleCloud
CNA base score7.7 CVSS v4.0CVSS: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
02 Description
Bucket Squatting in Cloud Run MCP leads to Service Account Takeover
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.31% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 24.1% of scored records. A rank, not a probability.
- NVD base score
- 7.7 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-26.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-26 14:58Z2 DAYS AGO
- Last updated
- 2026-10-26 14:58Z2 DAYS AGO
- Reserved
- 2026-09-03
- Assigning CNA
- GoogleCloud
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.7)
- CNA CVSS vector
- CVSS: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
- Weaknesses
- CWE-340Generation of Predictable Numbers or IdentifiersClass
- Data version
- 5.2
- Document digest
- 4bda9a803540913aaba97f5d632571bb66f7a2e48eeed02c5a44f20b2237762d
05 Affected products
VendorProductVersionsPlatforms
06 References
07 Remediation
Users must upgrade to Cloud Run MCP version 1.11.0 or later.