Vault token disclosure via unvalidated postMessage origin
Published Aug 21, 2026 · Updated Aug 21, 2026
Token disclosure in the N-able Passportal browser extension before 3.49.6 allows remote attackers to obtain vault tokens via crafted web content. The extension's message handler accepts window.postMessage events without validating the sender's origin and exposes a vault token to an untrusted page or iframe. Exploitation requires active user interaction with attacker-controlled web content in a browser where the extension is authenticated; the token enables access as that user.
Summary
What happened
Token disclosure in the N-able Passportal browser extension before 3.49.6 allows remote attackers to obtain vault tokens via crafted web content. The extension's message handler accepts window.postMessage events without validating the sender's origin and exposes a vault token to an untrusted page or iframe. Exploitation requires active user interaction with attacker-controlled web content in a browser where the extension is authenticated; the token enables access as that user.
The record
- CVE
- CVE-2026-15580
- Published
- Aug 21, 2026
- Updated
- Aug 21, 2026
- Vendor
- N-able
- Product
- Passportal
- Classifications
- CWE-1385, CAPEC-114, T1528
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 21, 2026CVE publishedPublication date reported by the CVE source.
- Aug 21, 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=0 <3.49.6
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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