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9.1 Critical

CVE-2026-70452 rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent…

Description

rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP access controls and gain unauthorized access to restricted module file trees.

Affected products and versions

Product Affected versions Fixed in
rsync 3.5 earliest → < 3.5.0 3.5.0
rsync 3.1 3.1.0 → 3.4.4 No fix stated

References

Timeline

  1. Published
  2. Last modified

Other CVEs of rsync

The 44 CVEs of rsync →
CVE-2026-119741 rsync < 3.5.2 Denial of Service via hash_search() Checksum Collisions 8.7 High CVE-2026-70453 rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote… 8.7 High 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… 7.6 High CVE-2026-70455 rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system… 8.7 High
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