by Kastro
Paper/Archive/CVE-2026-45390

CVE-2026-45390

mitre — In OCaml-tar before 3.4.0, a crafted archive with ../ path segments in its name allows escaping the current working directory.

EPSS 0.4%public exploitCVSS 9.1
critical.is priorityof 100
44
CVSS 9.1 (ADP)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 31.2.312 × 206.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE 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

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitosv.dev/vulnerability/OSEC-2026-08