CVE-2026-41082: In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent d
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Routine
HIGH 7.3WATCHLISTUPGRADEMITIGATEMITIGATE
CVE-2026-41082 is a high-severity flaw (CVSS 7.3) affecting opam, debian linux, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
debian debian linux MITIGATE
Affected: 11.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 11.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux MITIGATE
Affected: 10.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 10.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official sourceNVD · CVE Program · Report a problem with this page Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-41082?
opam: upgrade to 2.5.1; debian linux: mitigate or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2026-41082 being exploited?
CVE-2026-41082 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-41082 affect?
CVE-2026-41082 affects opam, debian linux, enterprise linux. Severity is high (CVSS 7.3). In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.
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