CVE-2026-53798

Summary

rsync tbefore 3.5.0 contains a privilege confusion vulnerability in the name-converter subprocess uid/gid mapping that allows local attackers to cause transferred files to be owned by root by influencing name-converter responses to return empty values. When the name-converter subprocess returns an empty response for a uid or gid lookup, rsync incorrectly interprets it as a successful resolution to uid/gid 0 (root) rather than a lookup failure, and if the name-converter also signals fake super-user status, rsync proceeds with root ownership assignments for transferred files.

Affected Software

Weaknesses

• CWE-704: CWE-704 Incorrect Type Conversion or Cast

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/RsyncProject/rsync/security/advisories/GHSA-hx7p-3gvv-pqgv
• https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
• https://www.vulncheck.com/advisories/rsync-privilege-confusion-via-name-converter-uid-gid-mapping

• ←Previous
• Next→