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HIGH

CVE-2026-53790

CVSS v3

8.1

HIGH

EPSS Score

0.6 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • rsyncAlmaLinux:10all versions · fixed in 3.5.0-3.el10_2and 2 other packages
  • rsyncAlmaLinux:9all versions · fixed in 3.2.7-1.el9_8and 2 other packages
  • rsyncAlmaLinux:8all versions · fixed in 3.1.3-28.el8_10and 1 other package

Vendor advisories

  • CVE-2026-53790 Red Hat Product Security49 products fixed · 5 known affected

    rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths

    rsync as a component of Red Hat Enterprise Linux 6 · rsync.src as a component of Red Hat Enterprise Linux 6 · rsync as a component of Red Hat Enterprise Linux 7

  • RHSA-2026:79357 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Cost Management On-Premise container image update

  • RHSA-2026:74095 Red Hat Product Security14 products fixed

    Red Hat Security Advisory: rsync security, bug fix, and enhancement update

  • RHSA-2026:71446 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.22.16 bug fix and security update

  • RHSA-2026:67462 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: rsync security, bug fix, and enhancement update

  • RHSA-2026:67463 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: rsync security, bug fix, and enhancement update

Full record on NVD

Description

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-08-13
Last Modified
2026-08-13

Frequently asked questions

What is CVE-2026-53790?

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.

Is CVE-2026-53790 actively exploited?

Active exploitation of CVE-2026-53790 has not been confirmed. Its EPSS score was 0.6% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-53790?

CVE-2026-53790 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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