What is CVE-2026-100308?

CVE-2026-100308 is a high-severity vulnerability in AWS Gluonts, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 7.8/10. Published 2026-09-29.

How severe is CVE-2026-100308?

High severity. CVSS v3 base score is 7.8 out of 10.

Deserialization in AWS Gluonts

CVE-2026-100308

Deserialization of untrusted data in the model loading component in Amazon GluonTS before 0.17.0 might allow context-dependent attackers to execute arbitrary operating system commands with the privileges of the loading process via a crafted serialized model directory. To remediate this issue, users should upgrade to version 0.17.0 or later.

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

AWS Gluonts

Weakness classification (CWE)

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)

Frequently asked questions

What is CVE-2026-100308?: CVE-2026-100308 is a high-severity vulnerability in AWS Gluonts, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 7.8/10. Published 2026-09-29.
How severe is CVE-2026-100308?: High severity. CVSS v3 base score is 7.8 out of 10.