CVE-2026-70452
published 2026-08-13CVE-2026-70452: 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…
PriorityP352high7.4CVSS 3.1
AVNACHPRNUINSUCHIHAN
EPSS
0.46%
38.5th percentile
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
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| rsyncproject | rsync | 3.1.0 – 3.4.4 | — |
| samba | rsync | — | — |
CVSS provenance
nvdv3.17.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
nvdv4.09.1CRITICALCVSS: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
vendor_redhat7.4HIGH
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Bugzilla
CVE-2026-70452 rsync-bpc: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [epel-all]
bugzilla·2026-08-21·CVSS 7.4
CVE-2026-70452 [HIGH] CVE-2026-70452 rsync-bpc: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [epel-all]
CVE-2026-70452 rsync-bpc: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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 res
Bugzilla
CVE-2026-70452 rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [fedora-all]
bugzilla·2026-08-21·CVSS 7.4
CVE-2026-70452 [HIGH] CVE-2026-70452 rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [fedora-all]
CVE-2026-70452 rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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 restr
Bugzilla
CVE-2026-70452 rsync-bpc: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [fedora-all]
bugzilla·2026-08-21·CVSS 7.4
CVE-2026-70452 [HIGH] CVE-2026-70452 rsync-bpc: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [fedora-all]
CVE-2026-70452 rsync-bpc: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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 r
Bugzilla
CVE-2026-70452 rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure
bugzilla·2026-08-13·CVSS 7.4
CVE-2026-70452 [HIGH] CVE-2026-70452 rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure
CVE-2026-70452 rsync: 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.
2026-08-13
Published