# CVE-2026-53797: rsync < 3.5.0 Symlink Race Condition Information Disclosure

> An attacker can exploit a symlink race condition in rsync to read files outside the intended transfer root by manipulating parent directories.

- **Severity:** Medium 5.7 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Aug 2026
- **Updated:** 14 Aug 2026
- **Also known as:** ALPINE-CVE-2026-53797, AZL-95780, BELL-CVE-2026-53797, DEBIAN-CVE-2026-53797, ECHO-7458-dc2a-8577, GHSA-3jj3-qvc7-jp6x, UBUNTU-CVE-2026-53797

## What is CVE-2026-53797?

CVE-2026-53797 is a medium-severity vulnerability in RsyncProject rsync, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's source tree traversal that allows an attacker who can manipulate a parent directory of the source tree to redirect file reads to unintended paths. Attackers can atomically replace a parent directory component with a symlink pointing outside the source root between path resolution and file open operations to disclose file contents outside the intended transfer root.

Weakness: CWE-59 (Improper Link Resolution Before File Access), CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2026-53797?

It affects 1 product.


Products: Samba Rsync.

## How do I fix CVE-2026-53797?

Upgrade to a fixed version.

## Is CVE-2026-53797 being exploited?

There is no known exploitation of CVE-2026-53797 in the wild and no public exploit code.

## Other vulnerabilities in RsyncProject rsync

- [CVE-2017-15994](https://insights.sbomify.com/CVE-2017-15994/): Security feature bypass in n/a (critical 9.8)
- [CVE-2026-53791](https://insights.sbomify.com/CVE-2026-53791/): rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (critical 9.1)
- [CVE-2026-70461](https://insights.sbomify.com/CVE-2026-70461/): rsync 3.2.5 < 3.5.0 Heap Out-of-Bounds Write via files-from Entry (high 8.8)
- [CVE-2026-70455](https://insights.sbomify.com/CVE-2026-70455/): rsync 3.4.2 < 3.5.0 DoS via --zt Zstandard Compression Thread Exhaustion (high 8.7)
- [CVE-2026-70463](https://insights.sbomify.com/CVE-2026-70463/): rsync 3.1.0 < 3.5.0 Authorization Bypass via auth users Directive Parsing (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53797 and fix it if it is affected.

What it is: CVE-2026-53797 is a medium-severity vulnerability in RsyncProject rsync, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-53797 in the wild and no public exploit code.

Affected product: RsyncProject rsync. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-53797/ (Markdown: https://insights.sbomify.com/CVE-2026-53797/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53797
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53797
- OSV: https://osv.dev/vulnerability/CVE-2026-53797

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53797/
Summaries are generated and may contain mistakes; the official description above is the record.