Buffer overflow in Rsyncproject Rsync
CVE-2026-70461
rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsync daemon module by providing a files-from entry containing both an interior and trailing backslash, causing the add_implied_include() function to under-count the trailing backslash when sizing the destination buffer.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.003
Affected products
- Rsyncproject Rsync — versions 3.2.5, 3.5.0
- Samba Rsync
Weakness classification (CWE)
References
- github.com/RsyncProject/rsync/releases/tag/v3.5.0 (release-notes, Product, Release Notes)
- github.com/RsyncProject/rsync/security/advisories/GHSA-jhxm-j4mq-3fj4 (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/rsync-heap-out-of-bounds-write-via-files-from-entry (Third Party Advisory, Release Notes, third-party-advisory)
Frequently asked questions
- What is CVE-2026-70461?
- CVE-2026-70461 is a high-severity vulnerability in Rsyncproject Rsync, classified under Out-of-bounds Write. CVSS score: 8.2/10. Published 2026-08-13.
- How severe is CVE-2026-70461?
- High severity. CVSS v3 base score is 8.2 out of 10.