CVE-2026-45232
Low
Description
Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.
SeverityLow
CVSS3.1
Exploit probability—
ProductSamba Rsync
PublishedMay 20, 2026
First seenMay 20, 2026
Weakness typeCWE-193CWE-193
How to fix
Update
- samba rsync3.4.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| samba rsync | v < 3.4.3 | 3.4.3 |
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