Eclipse Vert.x does not properly neutralize '' (forward slashes) sequences that can resolve to an external location
In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the StaticHandler uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '' (forward slashes) sequences that can resolve to a location that is outside of that directory when running on Windows Operating Systems.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.vertx:vertx-web | >= 3.0.0, < 3.5.4 | 3.5.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2018-12542
- https://github.com/vert-x3/vertx-web/issues/1025
- https://github.com/vert-x3/vertx-web/commit/57a65dce6f4c5aa5e3ce7288685e7f3447eb8f3b
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=539171
- https://github.com/advisories/GHSA-h39x-m55c-v55h
- https://github.com/vert-x3/vertx-web
- https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-22- Platform
- Java / Kotlin (Maven)
- Package
io.vertx:vertx-web- Disclosed
- 17.10.2018
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-h39x-m55c-v55h - CC BY 4.0
Vulnerability history: io.vertx:vertx-web
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 10.2018 10.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 2
- Medium 2
- Low 1
Disclosures per year
- 2018: 2
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 1
- 2023: 1
- 2024: 0
- 2025: 2
- 2026: 0
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Eclipse Vert.x does not properly neutralize '' (forward slashes) sequences that can resolve to an external location this entry
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