CVE-2026-89087 OCaml cstruct - Out of Bounds Read

OCaml cstruct before 6.3.0 contains an out of bounds read caused by mishandling indexes, letting attackers potentially cause denial of service or information disclosure, exploit requires crafted input.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.32% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read
Impact
Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
10 September 2026
Updated
15 October 2026
Weakness
CWE-573

Vendor fix

Upgrade to version 6.3.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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