The cstruct package before 6.3.0 for OCaml mishandles indexes.
Priority LOW 38CWE-573Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
The cstruct package before 6.3.0 for OCaml mishandles indexes.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00318 24th percentileScored 2026-11-07
Fix Fixed cstruct (OCaml): 6.3.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA cstruct (OCaml) Fixed in 6.3.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89087
- 2026-10-03 Alias added: GHSA-32j6-362j-46jc
References
More OCaml vulnerabilities
- TI-2026-60369 Improper signature verification in OCaml jose CVSS 3.1CRITICAL 9.1
- TI-2026-59889 An issue was discovered in the utcp package before 0.0.6 for OCaml. CVSS 3.1HIGH 7.5
- TI-2026-29719 In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory. CVSS 3.1HIGH 7.8
- TI-2026-59888 Improper certificate validation in OCaml mirage-crypto-ec CVSS 3.1MEDIUM 6.2
- TI-2026-59887 Improper signature verification in OCaml mirage-crypto CVSS 3.1MEDIUM 6.2
- TI-2018-07003 The caml_ba_deserialize function in byterun/bigarray.c in the standard library in OCaml… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2026-89087 · CVE Program
- CVE-2026-89087 · NVD
- FIRST EPSS
- GHSA-32j6-362j-46jc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences