CVE-2026-70461
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk41th percentile - higher than 41% of all known CVEs
Summary
rsync versions 3.2.5 before 3.5.0 contain 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.
Risk Assessment
The vulnerability can lead to memory corruption, potentially enabling remote code execution or causing service crashes.
Recommendation
Update rsync to version 3.5.0 or later, which contains the fix.
Original NVD description (English source)
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.