How severe is CVE-2026-47388?

No CVSS score has been assigned to CVE-2026-47388 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-47388?

CVE-2026-47388 affects the following packages: nocodb (npm). Ecosystems affected: npm.

How do I fix CVE-2026-47388?

Update nocodb to 2026.05.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-47388 is resolved across your whole dependency graph.

How do I detect CVE-2026-47388 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nocodb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-47388 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2026-47388 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-47388 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-47388?

CVE-2026-47388 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 18th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-47388?

CVE-2026-47388 is classified as CWE-639 (CWE-639). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-47388 published, and has it been updated?

CVE-2026-47388 was published on June 23, 2026 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

CVE-2026-47388 — nocodb

CVE-2026-47388 is a CWE-639 vulnerability in nocodb. A fix is available for nocodb — see the affected versions and patch details below.

NocoDB: Missing Ownership Check in MCP Attachment Read

Also known asGHSA-xxpj-q764-9r6q

Published

Jun 23, 2026

Updated

Aug 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 18, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-47388.

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs18th percentile — riskier than 18% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

nocodbnpm

2Kdownloads / week

Description

Summary

A low-privilege MCP token holder with knowledge of an attachment path could read any file in shared storage, including attachments belonging to other bases and workspaces, because the MCP readAttachment tool did not verify the file's ownership.

Details

The MCP readAttachment tool accepts caller-supplied path/url values and streams the file via the storage adapter. The handler now looks up the path in nc_file_references and requires a non-deleted row whose base_id matches the caller's MCP context before streaming; otherwise it returns Attachment is not accessible from this MCP context. The lookup tolerates both download/uploads/... and uploads/... styles.

Impact

Arbitrary read against shared storage scoped to attachments the caller's MCP context should not see. Exploitation requires an MCP token and a known attachment path.

Credit

This issue was reported by @helwor-01.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`nocodb`	all versions	2026.05.1`npm install nocodb@2026.05.1`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nocodb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nocodb to 2026.05.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-47388 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Summary A low-privilege MCP token holder with knowledge of an attachment path could read any file in shared storage, including attachments belonging to other bases and workspaces, because the MCP `readAttachment` tool did not verify the file's ownership. ### Details The MCP `readAttachment` tool accepts caller-supplied `path`/`url` values and streams the file via the storage adapter. The handler now looks up the path in `nc_file_references` and requires a non-deleted row whose `base_id` matches the caller's MCP context before streaming; otherwise it returns `Attachment is not accessible f

O3 Security · Impact-Aware SCA

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