CVE-2026-70454

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.

CVSS v3 8.0 HIGH

8.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
https://github.com/RsyncProject/rsync/security/advisories/GHSA-3c3x-ww2w-5r5p
https://www.vulncheck.com/advisories/rsync-tls-certificate-validation-bypass-via-ssl-openssl-mode

Configurations

No configuration.

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync 3.2.0 hasta 3.2.3 (modo OpenSSL) y rsync-ssl hasta 3.4.4 (modo stunnel) contienen una vulnerabilidad de validación de certificados TLS que permite a atacantes en la ruta interceptar sesiones cifradas presentando certificados autofirmados o de otro modo inválidos. Los atacantes pueden explotar la falla en validar certificados TLS del servidor contra una CA de confianza o verificar la coincidencia del nombre de host del certificado para descifrar o manipular el contenido de la sesión de rsync sin detección por parte del cliente.

Information

Published : 2026-08-13 15:19

Updated : 2026-10-24 16:10

NVD link : CVE-2026-70454

Mitre link : CVE-2026-70454

CVE.ORG link : CVE-2026-70454

JSON object : View

Products Affected

No product.

CWE

CWE-295

Improper Certificate Validation

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