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    CVE-2026-70453

    rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.

    Published:Aug 13, 2026
    Last Modified:Aug 14, 2026
    EPS:Aug 13, 2026
    EPSS Score:0.00525
    CVSS Score:7.5

    Affected Products

    Vendor
    Rsync Project
    Product
    Rsync
    Vendor
    Samba
    Product
    Rsync

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-70452 (CVSS 9.1) — rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circu…
    CVE-2026-70454 (CVSS 7.6) — rsync 3.2.0 through 3.2.3 (openssl mode) and rsync-ssl through 3.4.4 (stunnel mode) contain a TLS certificate …
    CVE-2026-70455 (CVSS 8.7) — rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust sys…
    CVE-2026-70456 (CVSS 8.8) — rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows…
    CVE-2026-70457 (CVSS 8.3) — rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprint…
    CVE-2026-70458 (CVSS 8.8) — rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt memory…
    CVE-2026-70459 (CVSS 6.9) — rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that al…
    CVE-2026-70460 (CVSS 9.2) — rsync 2.3.3 before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to escape the …
    CVE-2026-70461 (CVSS 8.8) — rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated …
    CVE-2026-70462 (CVSS 7.1) — rsync 3.1.0 before 3.5.0 contains a signed integer overflow vulnerability in the I/O timeout implementation th…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High