by Kastro
Paper/Archive/CVE-2026-53790

CVE-2026-53790

RsyncProject rsync — rsync < 3.5.0 Command Injection via Multiple Code Paths

EPSS 0.6%CVSS 9.2
critical.is priorityof 100
38
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 50.1.501 × 2010.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

rsync before 3.5.0 contains multiple command and argument injection vulnerabilities that allow attackers to execute arbitrary commands by supplying malicious input through several code paths, including the RSYNC_CONNECT_PROG environment variable, daemon hooks, the rsync-ssl wrapper, and remote-shell command newline injection. Attackers can inject shell metacharacters or newline characters into unsanitized user-supplied values such as hostnames and hostspecs to execute arbitrary commands under the privileges of the rsync process or the invoking user.

Affected

ProductAffectedFixed inSource
rsync≤ 3.4.43.5.0CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/RsyncProject/rsync/security/advisories/GHSA-5hcf-7xxm-rmqqrefgithub.com/RsyncProject/rsync/releases/tag/v3.5.0writeupvulncheck.com/advisories/rsync-command-injection-via-multiple-code-paths