CVE-2026-57825

medium

EUVD alias: EUVD-2026-74594

Assigned by CNA: mitre

Published 2026-09-09 · Modified 2026-09-09

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CVSS v3

5.7

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

CVSS v4 NEW

—

not yet in upstream

VIR risk

5.7

Description

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.

Predictions

Exploit likelihood

67%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-57825 NameCVE-2026-57825 DescriptionIn 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. SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) ReferencesDLA-4684-1, DSA-6386-1…

CVE-2026-57825

Name	CVE-2026-57825
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4684-1, DSA-6386-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
opam (PTS)	bookworm	2.1.2-1+deb12u1	vulnerable
	bookworm (security)	2.1.2-1+deb12u2	fixed
	trixie	2.3.0-1+deb13u1	vulnerable
	trixie (security)	2.3.0-1+deb13u2	fixed
	forky, sid	2.5.2-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
opam	source	bookworm	2.1.2-1+deb12u2	DLA-4684-1
opam	source	trixie	2.3.0-1+deb13u2	DSA-6386-1
opam	source	(unstable)	2.5.2-1

Notes

https://github.com/ocaml/security-advisories/blob/main/advisories/2026/OSEC-2026-10.md
https://github.com/ocaml/opam/pull/7005
Testcase: https://github.com/ocaml/opam/commit/362f5dc08c1436be964e14aa50a5837050124d36 (2.5.2)
Fixed by: https://github.com/ocaml/opam/commit/175a5d777806ad32fa6cdd95f2501dc4bd5e584e (2.5.2)

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

https://github.com/ocaml/security-advisories/blob/main/advisories/2026/OSEC-2026-10.mdhttps://github.com/ocaml/opam/pull/7005Testcase: https://github.com/ocaml/opam/commit/362f5dc08c1436be964e14aa50a5837050124d36 (2.5.2)Fixed by: https://github.com/ocaml/opam/commit/175a5d777806ad32fa6cdd95f2501dc4bd5e584e (2.5.2)

OS impact

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`2.3.0-1+deb13u2`
sid	Fixed	`2.5.2-1`
forky	Fixed	`2.5.2-1`
bullseye	Affected	—
bookworm	Fixed	`2.1.2-1+deb12u2`

Alpine Fixed 2 releases

Version	Status	Fixed in
v3.24	Fixed	`2.5.2-r0`
v3.23	Fixed	`2.5.2-r0`

References

CWEs

CWE-61

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.