# CVE-2026-53798

## Summary

- **CVE ID:** CVE-2026-53798
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-704
- **Published:** Aug 13, 2026
- **Last Modified:** Aug 14, 2026

## Description

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 Products

- RsyncProject — rsync (0)
- RsyncProject — rsync (3.5.0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._