Description
rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate validation vulnerability that allows on-path attackers to intercept encrypted sessions by presenting self-signed or otherwise invalid certificates. Attackers can exploit the failure to validate server TLS certificates against a trusted CA or verify certificate hostname matching to decrypt or tamper with rsync session content without detection by the client.
Published: 2026-08-13
Score: 7.6 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 14 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Samba
Samba rsync
CPEs cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*
Vendors & Products Samba
Samba rsync

Fri, 14 Aug 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Rsync Project
Rsync Project rsync
Vendors & Products Rsync Project
Rsync Project rsync

Thu, 13 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 13 Aug 2026 15:15:00 +0000

Type Values Removed Values Added
Description rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate validation vulnerability that allows on-path attackers to intercept encrypted sessions by presenting self-signed or otherwise invalid certificates. Attackers can exploit the failure to validate server TLS certificates against a trusted CA or verify certificate hostname matching to decrypt or tamper with rsync session content without detection by the client.
Title rsync < 3.5.0 TLS Certificate Validation Bypass via SSL/OpenSSL Mode
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-14T16:51:19.681Z

Reserved: 2026-08-04T14:52:23.814Z

Link: CVE-2026-70454

cve-icon Vulnrichment

Updated: 2026-08-13T15:37:17.720Z

cve-icon NVD

Status : Received

Published: 2026-08-13T15:19:59.047

Modified: 2026-08-13T16:19:01.373

Link: CVE-2026-70454

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-14T10:00:03Z

Weaknesses
  • CWE-295

    Improper Certificate Validation