CVE-2026-34353

mediumpriority · track · 20EPSS 0.001 · 4 %ileEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.15% (4th) EPSS
CVSS 5.1 · medium
Is it mine?
3 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-22

In OCaml through 4.14.3, Bigarray.reshape allows an integer overflow, and resultant reading of arbitrary memory, when untrusted data is processed.

01

cvss

Technical severity, 0–10. One row per scoring source.

6.1
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.1mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 1.4 · impact 3.6
v3.15.9mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU
v3.15.9mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · cve@mitre.org USexploitability 1.4 · impact 4
v3.16.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:Nsecondary · OSV
v3.14.7mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-190US
04

affected products (3)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • OSEC-2026-04Bigarray.reshape integer overflow2026-06-18vendor · osvUS

    The function `caml_ba_reshape`, part of the OCaml runtime (in runtime/bigarray.c), had a missing check for integer overflow when computing the size to be allocated. This leads to a segmentation fault. Any application using `Bigarray.reshape` (or `reshape_N`) with untrusted and unchecked input can result in a segmentation fault. ## Timeline - 2026-06-18 security advisory released - 2026-06-15 OCaml 4.14.4 released - 2026-04-16 Florian Angeletti backported the fix to the 4.14 branch - 2026-04-15 Stephen Dolan proposed fix https://github.com/ocaml/ocaml/pull/14691 - 2026-03-18 Andriy Sultanov reported https://github.com/ocaml/ocaml/issues/14655

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdnvdosvNVDCVE.orgMITRE
published 2026-03-27modified 2026-06-17
08

references (7)

External citations — patches, advisories, analysis.

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