Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- 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
FAQ
What is CVE-2026-70454?
CVE-2026-70454 is a vulnerability with a CVSS score of 8.0 (HIGH). 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 ...
How severe is CVE-2026-70454?
CVE-2026-70454 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-70454?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.