CVE-2026-6635 rowboatlabs CVE debrief

Who should care

Defenders responsible for rowboatlabs rowboat deployments should assess exposure and prioritize verification of affected versions in their inventory. This includes reviewing system logs for potential exploitation attempts and assessing the impact of improper authentication on system security. Security teams should also monitor for potential exploitation attempts and verify the presence of affected versions in their inventory.

Why it matters

CVE-2026-6635 is a security vulnerability in rowboatlabs rowboat up to 0.1.67 that can lead to improper authentication. Defenders should prioritize verifying affected versions in their inventory and assessing exposure of the tools_webhook component.

• Verify potential exposure of the tools_webhook component
• Assess the impact of improper authentication on system security
• Monitor for potential exploitation attempts

Technical summary

The vulnerability is caused by improper authentication in the tool_calls function of the apps/experimental/tools_webhook/app.py file in the tools_webhook component of rowboatlabs rowboat up to 0.1.67. The attack can be performed remotely by manipulating the X-Tools-JWE argument. This could lead to unauthorized access or control of affected systems. Defenders should prioritize verifying the presence of affected versions in their inventory and assessing exposure of the tools_webhook component. The exploit has been disclosed publicly and may be used.

Defensive priority

Defenders should prioritize verifying the presence of affected versions in their inventory and assessing exposure of the tools_webhook component.

Recommended defensive actions

• Verify the presence of affected versions in inventory
• Assess exposure of the tools_webhook component
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, the vendor did not respond to the disclosure, and there is limited information on affected versions or remediation. Defenders should verify the presence of affected versions in their inventory and assess exposure of the tools_webhook component. The exploit has been disclosed publicly and may be used. Evidence is limited, and further verification tasks are required to confirm affected scope and severity.

Sources and 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.