What’s Vulnerable › Vulnerabilities

CVE-2024-30254: Directory traversal allowing overwriting arbitrary files

• Severity: medium (CVSS 5.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-04 · updated 2026-06-17
• Weakness: CWE-22

Description

MesonLSP is an unofficial, unendorsed language server for meson written in C++. A vulnerability in versions prior to 4.1.4 allows overwriting arbitrary files if the attacker can make the victim either run the language server within a specific crafted project or `mesonlsp --full`. Version 4.1.4 contains a patch for this issue. As a workaround, avoid running `mesonlsp --full` and set the language server option `others.neverDownloadAutomatically` to `true`.

Affected products

• JCWasmx86 mesonlsp: before 4.1.4 — fixed in 4.1.4

How to fix

Upgrade to a fixed version: JCWasmx86 mesonlsp 4.1.4. Check the vendor advisory for mitigations.

References

• https://github.com/JCWasmx86/mesonlsp/commit/594b6334061371911cd59389124ab8af30ce0a3a
• https://github.com/JCWasmx86/mesonlsp/security/advisories/GHSA-48c5-35fh-846h
• https://github.com/JCWasmx86/mesonlsp/commit/594b6334061371911cd59389124ab8af30ce0a3a
• https://github.com/JCWasmx86/mesonlsp/security/advisories/GHSA-48c5-35fh-846h

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