OAuth2 token disclosure via unscoped test results
Published Aug 12, 2026 · Updated Aug 12, 2026
Information disclosure in Budibase before 3.39.25 allows remote authenticated users to steal a co-builder's OAuth2 tokens during testing. The automation test pipeline returns trigger.outputs.user.oauth2 unredacted, broadcasts the result to the app room, and caches it under only the app and automation identifiers. Exploitation requires builder access to the same app and an SSO-authenticated co-builder to run a test; the exposed access and refresh tokens grant access to that user's external services.
Summary
What happened
Information disclosure in Budibase before 3.39.25 allows remote authenticated users to steal a co-builder's OAuth2 tokens during testing. The automation test pipeline returns trigger.outputs.user.oauth2 unredacted, broadcasts the result to the app room, and caches it under only the app and automation identifiers. Exploitation requires builder access to the same app and an SSO-authenticated co-builder to run a test; the exposed access and refresh tokens grant access to that user's external services.
The record
- CVE
- CVE-2026-73308
- Published
- Aug 12, 2026
- Updated
- Aug 12, 2026
- Vendor
- Budibase
- Product
- Budibase
- Classifications
- CWE-200, T1528
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 2026CVE publishedPublication date reported by the CVE source.
- Aug 12, 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.
- Affected versionversion=< 3.39.25
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Same-app builder polling proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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