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PatchSiren cyber security CVE debrief

CVE-2026-15329 zhayujie CVE debrief

CVE-2026-15329 is an information disclosure vulnerability in CowAgent's Browser Tool. The issue affects the BrowserTool._do_navigate function in agent/tools/browser/browser_tool.py. The vulnerability allows remote attackers to disclose sensitive information. The exploit has been made public, and the project has been informed but has not responded yet. This vulnerability has a low severity and requires limited privileges to exploit.

Vendor
zhayujie
Product
CowAgent
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-10
Original CVE updated
2026-07-14
Advisory published
2026-07-10
Advisory updated
2026-07-14

Who should care

Users of CowAgent up to version 2.1.0 should be aware of this vulnerability and take necessary precautions to protect their systems, including reviewing system configurations, monitoring for suspicious activity, and applying patches or updates as soon as they are available.

Technical summary

The vulnerability is caused by a manipulation of the BrowserTool._do_navigate function in agent/tools/browser/browser_tool.py. This function is part of the Browser Tool component in CowAgent. The vulnerability has a CVSS score of 2.1 and a severity of LOW. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

Defensive priority

This vulnerability has a low severity and requires limited privileges to exploit. However, it is still important to address this issue to prevent potential information disclosure.

Recommended defensive actions

  • Inventory and verify affected CowAgent installations
  • Apply vendor patches or updates when available
  • Implement compensating controls to monitor and restrict access to sensitive information
  • Monitor for potential exploitation attempts
  • Review system configurations and ensure proper security controls are in place
  • Conduct regular security audits to identify potential vulnerabilities
  • Establish a incident response plan in case of a security breach

Evidence notes

The CVE record was published on 2026-07-10T04:17:50.590Z and was last modified on 2026-07-10T15:43:30.330Z. The NVD entry is currently Deferred. The project was informed of the problem early through an issue report but has not responded yet. The vulnerability has a CVSS score of 2.1 and a severity of LOW.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-15329 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-15329

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-15329 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-15329

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.