CVE-2025-26683 is a High severity improper authorization flaw (CVSS 8.1) in Azure Playwright. The record says an unauthorized attacker could elevate privileges over a network. Microsoft publishes the details and any action in its Security Update Guide, so read that entry for your setup.
What's affected
- Product: Azure Playwright, the Microsoft service for running Playwright browser tests
- Weakness: improper authorization
- Versions: the record does not list any
- Fix: see the Microsoft guide entry
The record is one sentence long, and it gives no affected versions and no fixed versions. The Microsoft Security Update Guide page loads its content with JavaScript, so I could not read it from an automated fetch. I will not state whether customers need to take action. For some cloud service flaws, Microsoft fixes the service itself and customers have nothing to install. For others, there are client side or configuration steps. The guide entry is the place that says which applies.
The CVSS vector shows a network attack with high complexity and no privileges required, with high impact on confidentiality, integrity and availability.
How to check if you're exposed
Open the Microsoft Security Update Guide entry for this CVE and read the FAQ and the list of actions. If it names a client library or tool version, check the version you use.
If your test projects use the Playwright test package with the Azure service, check your lock file for the installed packages:
npm ls --all | grep -i playwright
Then look at who can start test runs and which identities can reach your Azure Playwright workspaces. Review role assignments in the Azure portal for the workspace, and look at the activity log for runs started by identities you do not recognise.
What to do now
- Read the Microsoft guide entry for CVE-2025-26683 and follow any action it lists.
- Review role assignments on your Azure Playwright workspaces. Remove anyone who does not need access, and use least privilege.
- Keep your Playwright packages up to date, and update if the guide names a fixed version.
- Review the activity log of the workspace for unexpected runs or access.
- Treat access tokens used by test pipelines as secrets. Store them in your pipeline secret store and rotate them if you have doubts.
Why it matters
The weakness is CWE-285 (improper authorization). In plain words, a check that should decide who may do what was not strict enough, and a person without the right permission could gain more. These bugs are not about memory or input handling. They are about the rules.
Test infrastructure can be sensitive. Browser tests often run with real credentials, against staging systems that look much like production, and with network access to internal services. An attacker with extra privileges in that environment can learn a lot.
The record does not say the flaw is exploited, and it is not in the CISA Known Exploited Vulnerabilities catalog.
Quick check
Do I need to install a patch for CVE-2025-26683?
I could not read the Microsoft guide entry, so I cannot say. Check the entry. Cloud service flaws are sometimes fixed by Microsoft with no customer step.
How severe is it?
The record scores it 8.1, High, with a network attack vector and no privileges required, but with high attack complexity.
Sources
Check your own dependencies with the free in-browser scan.
Last reviewed: 19 October 2026.
