CVE-2026-45232Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy
Updated under an hour ago ()
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It affects RsyncProject rsync and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 3.1 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-193
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Jul 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
RsyncProject rsync rsyncproject:rsync (from the name) | before 3.4.3 | CNA record |
samba rsync samba:rsync | before 3.4.3 | NVD |
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-8f85-j2cv-59m8vendor-advisory
- https://github.com/RsyncProject/rsync/releases/tag/v3.4.3release-notes
- https://www.vulncheck.com/advisories/rsync-off-by-one-stack-write-via-http-proxythird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.