# CVE-2026-53792

## Summary

- **CVE ID:** CVE-2026-53792
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-129, CWE-787
- **Published:** Aug 13, 2026
- **Last Modified:** Aug 14, 2026

## Description

rsync before 3.5.0 contains an out-of-bounds read vulnerability in the sender-side block matching logic that allows a malicious receiver to trigger memory access before the start of an allocated buffer by sending a crafted checksum block with a length of zero. Attackers can send a specially crafted checksum set containing a zero-length block to cause a negative offset calculation during delta computation, resulting in an out-of-bounds read of file data buffer memory on the sender side.

## Affected Products

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

## References

- [CNA](https://github.com/RsyncProject/rsync/security/advisories/GHSA-cg57-rp9g-56hw)
- [CNA](https://github.com/RsyncProject/rsync/releases/tag/v3.5.0)
- [CNA](https://www.vulncheck.com/advisories/rsync-out-of-bounds-read-via-zero-length-checksum-block)

## 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._