VULNRABLE / Vulnerability / CVE-2026-88018

CVE-2026-88018

CRITICAL WATCH github.com/rclone/rclone GHSA

Exploit verdict: CVSS 9.5 · critical severity

CVSS Score

9.5

Severity

CRITICAL

EPSS

Source

GHSA

Summary

rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass

What this means

CVE-2026-88018 is a critical-severity vulnerability affecting github.com/rclone/rclone, rated CVSS 9.5. The EPSS model estimates a 0% probability of exploitation in the next 30 days. Published September 11, 2026.

View full advisory at GHSA →