Medium 5.7Published Sep 9, 2026

CVE-2026-57825In the opam package before 2.5.2 for OCaml, the sandbox protection mechanism can be bypassed because symlinks are mishandled during use of .install files.

Updated under an hour ago (2026-10-19 08:30 UTC)

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It affects OCaml opam. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for OCaml opam

Exploited in the last 30 days

In the opam package before 2.5.2 for OCaml, the sandbox protection mechanism can be bypassed because symlinks are mishandled during use of .install files.

CVSS: 5.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-61
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Deferred
Record last updated: Sep 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

OCaml opam ocaml:opam (from the name)	before 2.5.2	CNA record

References

https://github.com/ocaml/opam/releases
https://osv.dev/vulnerability/OSEC-2026-10
https://lists.debian.org/debian-lts-announce/2026/07/msg00026.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.