Unvalidated PostMessage Vulnerability in N-able PassPortal Browser Extension
CVE-2026-15580

6.9MEDIUM

Key Information:

Vendor

N-able

Status
Passportal
Vendor
CVE Published:
21 August 2026

What is CVE-2026-15580?

The N-able PassPortal browser extension is susceptible to an unvalidated postMessage vulnerability that enables the disclosure of vault tokens. This flaw can lead to authentication abuse, allowing attackers to potentially gain unauthorized access to user information. Users should ensure they are using versions later than 3.49.6 to mitigate this risk.

Affected Version(s)

PassPortal 0 < 3.49.6

References

https://me.n-able.com/s/security-advisory/aArVy0000002GQT...

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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