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CVE

CVE-2026-70452

rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure
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CVE

CVE-2026-70452

rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
4.0
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70452.json, https://github.com/RsyncProject/rsync/releases/tag/v3.5.0, https://github.com/RsyncProject/rsync/security/advisories/GHSA-6692-28cx-wpqq, https://nvd.nist.gov/vuln/detail/CVE-2026-70452, https://www.vulncheck.com/advisories/rsync-access-control-bypass-via-dns-resolution-failure, https://github.com/RsyncProject/rsync

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00462%
EPSS Percentile
0.38149%
Introduced Version
bc58313bf7f42f0993f7279299e8137e0f14f01c,0
Fix Available
471e17dc0d68233db84db11be82c9f62f4661214

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