{"id":"CVE-2026-119741","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-119741","summary":"rsync through 3.5.1 Denial of Service via hash_search() Checksum Collisions","details":"rsync through 3.5.1 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.","published":"2026-11-03T15:26:27.533Z","modified":"2026-11-04T07:04:31.960947063Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/RsyncProject/rsync/commit/a7404a9a633cff28ee1602f328b9c3fa69cdbd04","label":"RsyncProject/rsync@a7404a9"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119741.json"},{"type":"PACKAGE","url":"https://github.com/RsyncProject/rsync"},{"type":"ARTICLE","url":"https://github.com/RsyncProject/rsync/blob/a7404a9a633cff28ee1602f328b9c3fa69cdbd04/testsuite/hashsearch-collision-skip_test.py"},{"type":"FIX","url":"https://github.com/RsyncProject/rsync/commit/a7404a9a633cff28ee1602f328b9c3fa69cdbd04"},{"type":"FIX","url":"https://github.com/RsyncProject/rsync/pull/1132"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119741"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/rsync-through-3.5.1-denial-of-service-via-hash-search-checksum-collisions"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-04T07:04:31.960947063Z"}}