Security readout for executives and security teams
Plain-English summary
CVE-2026-41082 is a path traversal flaw in OCaml opam before 2.5.1. A crafted .install destination path can escape its intended directory using parent-directory traversal. The main business risk is integrity impact on developer or build systems that install OCaml packages with affected opam versions.
Executive priority
Treat this as a high-priority developer tooling issue, especially where OCaml dependencies are installed in CI or packaging workflows. Prioritize upgrade over compensating controls because the fix is identified as opam 2.5.1.
Technical view
The issue is classified as CWE-24. opam before 2.5.1 did not sufficiently constrain destination file paths in .install metadata, allowing ../ traversal to a parent directory. CVSS 3.1 is 7.3 with local attack vector, low complexity, no privileges required, and high integrity impact.
Likely exposure
Exposure is most likely on developer workstations, CI builders, packaging systems, or servers using opam before 2.5.1 to install OCaml packages. The provided data does not prove every downstream distribution package is affected.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source here confirms active exploitation. The CVSS vector indicates local exploitation conditions, with no privileges or user interaction required once the vulnerable processing path is reached.
Researcher notes
Evidence supports a path traversal in .install destination handling, fixed by the opam 2.5.1 release and related upstream pull request. The bundle has incomplete downstream affected-version detail, including an unusual affected version value of 0, so verify package-specific advisories.
Mitigation direction
- Upgrade opam to version 2.5.1 or later.
- Apply distribution-provided opam updates where Debian or Red Hat guidance applies.
- Check vendor advisories for environment-specific fixed package versions.
- Limit installation of untrusted OCaml packages until affected opam versions are replaced.
- Review build and CI systems for affected opam installations.
Validation and detection
- Inventory opam versions across developer, CI, and build environments.
- Confirm all opam installations report version 2.5.1 or later.
- Check Debian and Red Hat advisory status for managed hosts.
- Review package build logs for unexpected file writes during opam installs.
- Document any systems that cannot be upgraded and apply vendor guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-24: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-41082 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L2.54.7mitreCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H1.85.2redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-04-16T18:00:56.999Z: Reported to Red Hat.
- 2026-04-16T17:32:40.068Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ocaml/opam/releases/tag/2.5.1CVE reference, mitre
- https://github.com/ocaml/opam/pull/6897CVE reference, mitre
- https://osv.dev/vulnerability/OSEC-2026-03CVE reference, mitre
- https://lists.debian.org/debian-lts-announce/2026/04/msg00021.htmlCVE reference, CVE
- https://access.redhat.com/security/cve/CVE-2026-41082CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2459003CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Path Traversal: '../filedir'
Path Traversal: '../filedir' represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.