VULNERABILITY INTELLIGENCE

CVE-2026-45232

CVSS score2.1 LOW
EPSS probability0.34%
CISA KEVNot currently listed
Published2026-05-20
Last modified2026-07-24
CVSS vectorCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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.

Weakness classification

  • CWE-193: Off-by-one Error

Primary references