CVE-2026-47386Network attack vector

OAuth token duplication via non-atomic code claim

Published Jun 23, 2026 · Updated Jun 23, 2026

Race condition in NocoDB before 2026.05.1 allows remote attackers to mint a second OAuth token pair by racing an authorization-code exchange. The token-exchange flow reads is_used, then marks the code used with an unconditional update only after inserting tokens, so concurrent requests both pass the check. Exploitation requires the authorization code and matching PKCE verifier, and grants an additional long-lived refresh token alongside the legitimate token.

CVSS severity6.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in NocoDB before 2026.05.1 allows remote attackers to mint a second OAuth token pair by racing an authorization-code exchange. The token-exchange flow reads is_used, then marks the code used with an unconditional update only after inserting tokens, so concurrent requests both pass the check. Exploitation requires the authorization code and matching PKCE verifier, and grants an additional long-lived refresh token alongside the legitimate token.

The record

CVE
CVE-2026-47386
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
NocoDB
Product
NocoDB
Classifications
CWE-362, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2026.05.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NocoDB · NocoDBversion=< 2026.05.1

Published CVSS scores

6.3GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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