CVE-2026-79781

Summary

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in the serve root directory.

Affected Software

Weaknesses

• CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v

References

• https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v
• https://www.vulncheck.com/advisories/rclone-serve-s3-path-traversal-via-dot-dot-object-keys

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