PT-2026-71660

Name of the Vulnerable Software and Affected Versions rsync versions 2.3.3 through 3.4.x Description A path traversal issue exists where a malicious sender can escape the module root by exploiting symlinks within the module file tree. This occurs when using the --partial-dir or --backup-dir...

CVE-2026-53803: Improper Link Resolution Before File Access

rsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or daemon-mode log and statistics paths. Attackers can exploit rsync's failure to reject...

CVE-2026-70452: Incorrect Authorization

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 ru...

PT-2026-71630

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.5.0 Description An out-of-bounds read exists in the sender-side block matching logic. A malicious receiver can trigger memory access before the start of an allocated buffer by sending a crafted checksum block with a...

CVE-2026-70455: Allocation of Resources Without Limits or Throttling

rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt short alias for --compress-threads, which bypasses the refuse options directive's string matching on long option names. Attackers can specify --zt=N...

CVE-2026-53788: Improper Neutralization of CRLF Sequences

rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names...

CVE-2026-53792: Improper Validation of Array Index

rsync before 3.5.0 contains an out-of-bounds read vulnerability in the sender-side block matching logic that allows a malicious receiver to trigger memory access before the start of an allocated buffer by sending a crafted checksum block with a length of zero. Attackers can send a specially craft...

PT-2026-71657

Name of the Vulnerable Software and Affected Versions rsync versions 3.2.3 through 3.4.x Description An out-of-bounds write exists in the parse size arg function. The issue occurs because the return value of snprintf is used as an index for a .bss-segment array without proper bounds checking. Whe...

PT-2026-71662

Name of the Vulnerable Software and Affected Versions rsync versions 3.1.0 through 3.4.x Description A signed integer overflow exists in the I/O timeout implementation. An attacker can inject MSG IO TIMEOUT messages containing non-positive values zero or negative, causing the timeout variable to...

PT-2026-71659

Name of the Vulnerable Software and Affected Versions rsync versions 3.0.0 through 3.4.x Description A null pointer dereference occurs in the daemon child process. A remote attacker can cause the daemon to crash by sending a file list where the first entry is a dot entry not typed as a directory...

CVE-2026-70459: Use of Uninitialized Resource

rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that allows remote attackers to crash the daemon by sending a file list whose first entry is a dot entry not typed as a directory. The daemon dereferences the first file list entry as a director...

CVE-2026-70461

rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsyn...

PT-2026-71623

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.5.0 Description A path traversal issue exists when the use chroot setting is disabled and the module root path, or any of its components, is a symbolic link a file that points to another file or directory. During...

CVE-2026-53784: Improper Link Resolution Before File Access

rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir to the module root at session initialization withou...

CVE-2026-53783

rsync before 3.5.0 contains a time-of-check to time-of-use TOCTOU race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer...

PT-2026-71631

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.5.0 Description A path confinement bypass allows remote clients to escape the intended inner-module root confinement. This occurs when the module root contains a /./ boundary marker, enabling the construction of paths...

PT-2026-71664

Name of the Vulnerable Software and Affected Versions rsync daemon versions 2.0.0 through 3.4.9 Description A denial of service issue exists that allows unauthenticated remote attackers to exhaust daemon connection slots. This is achieved by stalling the handshake process either before or after...

PT-2026-71639

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.5.0 Description A symlink race condition exists in the sender's directory scanning logic. This occurs when an attacker manipulates symlinks in a path component of the scanned tree, replacing a symlink with a directory...

PT-2026-71663

Name of the Vulnerable Software and Affected Versions rsync versions 3.1.0 through 3.4.x Description An authorization bypass exists in the parsing of the auth users directive. The parser utilizes comma-only tokenization when splitting the user list, which fails to correctly process entries...

CVE-2026-53793: Improper Link Resolution Before File Access

rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper...