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CVE-2024-12086 is an information disclosure vulnerability in rsync affecting versions through 3.3.0. The flaw occurs during client-to-server transfer operations, where the rsync server sends checksum data to the client so the client can determine which file data must be transmitted. A malicious server can provide specially crafted checksum values associated with arbitrary files, allowing it to infer and reconstruct the contents of client-side files byte by byte from the client’s responses. The issue enables a server participating in an rsync session to enumerate and recover data from arbitrary files on the client machine, resulting in unintended disclosure of client-resident information.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An earlier rsync vulnerability for which the secure_relative_open() mitigation was originally introduced; mentioned as background to the fix for CVE-2026-29518.
One of a set of Rsync daemon vulnerabilities (Rsync <= 3.3.0) that can contribute to remote code execution, directory traversal, and/or sensitive information disclosure.
An information leak vulnerability in rsync.
An rsync client vulnerability that allows a malicious server to read arbitrary files.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.