HIGH 8.7 NVD
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
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.
References
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-8x5r-mjx8-83hv
- https://www.vulncheck.com/advisories/rsync-algorithmic-complexity-dos-via-hash-search
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-08-13 via NVD.
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