CVE-2023-45277 Yamcs Path Traversal vulnerability
An attacker can exploit a directory traversal flaw in Yamcs to escape the base directory and read arbitrary files on the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-45277?
CVE-2023-45277 is a high-severity path traversal vulnerability in n/a, published on 19 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Yamcs 5.8.6 is vulnerable to directory traversal (issue 1 of 2). The vulnerability is in the storage functionality of the API and allows one to escape the base directory of the buckets, freely navigate system directories, and read arbitrary files.
Weakness: CWE-22
Which versions are affected by CVE-2023-45277?
2 open source packages ship an affected version, including org.yamcs:yamcs. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.yamcs:yamcs Maven | All versions | 5.8.7 |
org.yamcs:yamcs Maven | All versions | 5.8.7 |
Products include Spaceapplications Yamcs.
How do I fix CVE-2023-45277?
Upgrade org.yamcs:yamcs to 5.8.7 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2023-45277 being exploited?
There is no known exploitation of CVE-2023-45277 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
- CVE-2026-46562 Yamcs: Remote Code Execution via Mission Database algorithm override
- CVE-2026-44632 Yamcs: Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory`
- CVE-2026-46621 Yamcs: Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection
- CVE-2023-45278 Yamcs API Directory Traversal vulnerability
- CVE-2026-44596 Yamcs: No Rate Limiting on Authentication Endpoint
Sources
Also known as GHSA-w4m2-qmh3-2g8f.