CVE-2026-45390
Critical · 9.1CVSS
9.1
EPSS
0.5%
Published
Jun 15, 2026
CISA due date
—
The record
In OCaml-tar before 3.4.0, a crafted archive with ../ path segments in its name allows escaping the current working directory. This is not desired behavior, and tar(1) rejects such extractions, but ocaml-tar decompresses it anyway. The impact is that it allows arbitrary file writes outside of the desired extraction directory (to an attacker that can reach a tar decompression endpoint).
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| opam | tar | 0 | 3.5.0 |
Related vulnerabilities
- OSEC-2026-08 Path traversal vulnerability in ocaml-tar Same vulnerability
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