CVE-2026-116193 rclone CVE debrief

Who should care

Defenders responsible for Rclone installations, particularly those using serve webdav, should assess exposure and apply patches. Defenders should prioritize verifying Rclone versions and applying patches to prevent exploitation. The vulnerability has significant implications for defenders, who must verify Rclone versions and apply patches to prevent exploitation.

Why it matters

CVE-2026-116193 is an authentication bypass vulnerability in Rclone's serve webdav, affecting versions from 1.64.0 before 1.75.2. Defenders should prioritize verifying Rclone versions and applying patches to prevent exploitation.

• Namespace enumeration via OPTIONS requests
• Potential for unauthorized access to sensitive data
• Need for verification of Rclone versions and patch application
• Possible impact on data confidentiality

Technical summary

The vulnerability allows unauthenticated attackers to skip authentication by sending OPTIONS requests to Rclone's serve webdav, enabling namespace enumeration. This vulnerability affects Rclone versions from 1.64.0 before 1.75.2 and has a CVSS score of 6.9 and a severity of MEDIUM. Defenders should prioritize verifying Rclone versions and applying patches to prevent exploitation. The vulnerability has significant implications for defenders, who must verify Rclone versions and apply patches to prevent exploitation. The Rclone serve webdav is affected, and defenders should assess exposure and apply patches.

Defensive priority

Defenders should prioritize verifying Rclone versions and applying patches to prevent exploitation.

Recommended defensive actions

• Verify Rclone versions and apply patches to prevent exploitation
• Monitor for suspicious OPTIONS requests to Rclone serve webdav
• Restrict access to Rclone serve webdav to trusted sources
• 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, including its description and affected versions. The vulnerability allows unauthenticated attackers to skip authentication by sending OPTIONS requests, enabling namespace enumeration. Defenders should prioritize verifying Rclone versions and applying patches to prevent exploitation. The Rclone serve webdav is affected, and defenders should assess exposure and apply patches. The vulnerability has a CVSS score of 6.9 and a severity of MEDIUM.

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.