PatchTheCVECVE-2026-119741: rsync through 3.5.1 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in
CVE-2026-119741 is a high-severity flaw (CVSS 7.5) affecting rsync. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | n/a |
| CISA exploited list | No |
| Weakness | CWE-407 |
| Published | 2026-11-03 |
| Last modified | 2026-11-03 |
Last updated 2026-11-03 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Research and news
- VulDB Recent Entries: CVE-2026-119741 | RsyncProject rsync up to 3.5.1 Delta Transfer Sender match.c hash_search denial of service 2026-11-03
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-119741?
rsync: upgrade to newer than 3.5.1. Exact commands for each OS are on this page.
Is CVE-2026-119741 being exploited?
CVE-2026-119741 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-119741 affect?
CVE-2026-119741 affects rsync. Severity is high (CVSS 7.5). 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 attacke
How urgent is CVE-2026-119741?
Priority 31/100. High severity; Remotely exploitable, no login, no user action
Software pages
Windows vulnerabilities · Samba vulnerabilities
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