CVE-2026-79783

Summary

rclone before 1.74.4 fails to mask special permission bits when applying source-supplied mode metadata in the local backend, allowing attackers to set setuid/setgid bits on attacker-controlled files. When copying with metadata preservation from an untrusted remote, attackers can plant a setuid binary that escalates privileges to root if rclone runs as root, or to the service account user otherwise.

Affected Software

VendorProductVersion RangeStatus
rclonerclone0 < 1.74.4affected
rclonerclone1.74.4unaffected

Weaknesses

  • CWE-732: Incorrect Permission Assignment for Critical Resource

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: partial

Additional References

References