The cstruct package before 6.3.0 for OCaml mishandles indexes.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
OCaml cstruct unaffected
Version Status Constraints
0 affected < 6.3.0

No data.

No data.

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://osv.dev/vulnerability/OSEC-2026-20 cve-icon cve-icon
History

Thu, 10 Sep 2026 23:30:00 +0000

Type Values Removed Values Added
Title Index Out‑of‑Bounds Vulnerability in OCaml cstruct

Thu, 10 Sep 2026 20:00:00 +0000

Type Values Removed Values Added
Description The cstruct package before 6.3.0 for OCaml mishandles indexes.
Weaknesses CWE-573
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-10T19:55:44.327Z

Reserved: 2026-09-10T19:55:43.954Z

Link: CVE-2026-89087

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-10T20:17:32.247

Modified: 2026-09-10T20:17:32.247

Link: CVE-2026-89087

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T23:15:08Z

Weaknesses