---
id: CVE-2026-53788
title: "rsync before 3.5.0\_contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters"
summary: "rsync before 3.5.0\_contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-93
published: '2026-08-13'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:28:37.587'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53788'
references:
  - url: 'https://github.com/RsyncProject/rsync/releases/tag/v3.5.0'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/RsyncProject/rsync/security/advisories/GHSA-p4c5-8c68-5fjq
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/rsync-newline-injection-via-name-converter-uid-gid-mapping
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53788.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-53788'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2515370'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-53788'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53788'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00342
epssPercentile: 0.25162
ingestedAt: '2026-09-08T21:11:12.276Z'
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
scores:
  nvd: 6.5
  vendor: 4.8
---

## Overview

rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53788.json)