CVE-2026-70463: rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users parser uses…
CVE-2026-70463 · Severity: high · CVSS 8.1 · Published 2026-08-13
rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users parser uses comma-only tokenization when splitting the user list, which fails to correctly handle entries of the form @Group Name where the group name contains a space. The space within the group name causes the parser to split the entry at the space boundary, discarding the deny rule associated with the group. An authenticated user whose username or group membership would be denied by an @Group Name auth users entry can connect to a restricted module because the deny rule is silently discarded during parsing.
No. Junglewise Threat Intelligence has no report of CVE-2026-70463 being exploited in the wild.
How severe is CVE-2026-70463?
High severity, with a CVSS score of 8.1, published 13 August 2026.
Which products and versions are affected?
Samba Rsync. The advisory does not name versions.
Is there a fix for CVE-2026-70463?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-70463?
Check whether you run Samba Rsync. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.