Authenticated local file disclosure via file URL navigation
Published Jul 10, 2026 · Updated Jul 10, 2026
Local file disclosure in CowAgent 2.0 and 2.1.0 allows remote authenticated users to read service-account files through the Browser Tool. BrowserTool._do_navigate preserves an attacker-controlled file URL, Playwright opens it, and the automatic snapshot returns the file text. Reachability requires access to invoke browser.navigate, and disclosure is limited to files readable by the CowAgent process.
Summary
What happened
Local file disclosure in CowAgent 2.0 and 2.1.0 allows remote authenticated users to read service-account files through the Browser Tool. BrowserTool._do_navigate preserves an attacker-controlled file URL, Playwright opens it, and the automatic snapshot returns the file text. Reachability requires access to invoke browser.navigate, and disclosure is limited to files readable by the CowAgent process.
The record
- CVE
- CVE-2026-15329
- Published
- Jul 10, 2026
- Updated
- Jul 10, 2026
- Vendor
- zhayujie
- Product
- CowAgent
- Classifications
- CWE-200, CWE-284, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 10, 2026CVE publishedPublication date reported by the CVE source.
- Jul 10, 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=2.0
- Affected versionversion=2.1.0
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
- CowAgent file-URL navigation verification PoCproof of concept · demonstrated
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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