CVE-2026-70453: rsync < 3.5.0 Algorithmic Complexity DoS via hash_search()
RsyncProject · rsync
Fixed in 3.5.0 · Affected: RsyncProject before 3.5.0 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 48% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- RsyncProject · rsyncup to and including 3.4.4
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- RsyncProject
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-70453 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.