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PatchSiren cyber security CVE debrief

CVE-2026-41082 OCaml CVE debrief

CVE-2026-41082 is a HIGH-severity vulnerability in OCaml opam, a package manager for OCaml. The vulnerability allows a .install field to use ../ to reach a parent directory, potentially leading to security issues.

Vendor
OCaml
Product
opam
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-16
Original CVE updated
2026-07-15
Advisory published
2026-04-16
Advisory updated
2026-07-15

Who should care

Users of OCaml opam before version 2.5.1 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by the ability to use ../ in a .install field, which can be used to reach a parent directory. This could potentially be used to overwrite files or directories outside of the intended installation location.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to OCaml opam version 2.5.1 or later.
  • Review and validate .install files to ensure they do not use ../ to reach parent directories.

Evidence notes

The CVE record and NVD detail pages provide additional information about this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41082 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41082

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41082 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41082

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.