CVE-2026-84851CWE-674

CVE-2026-84851

High · published September 3, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
26.8
In the wild
Unconfirmed
What it is

An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00339 · 26.8th percentile
Weakness
CWE-674 · Uncontrolled Recursion
Published
2026-09-03T09:16Z
References (3)
https://aws.amazon.com/security/security-bulletins/2026-094-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 04 SEP 03:44Z
    EPSS moved — → 0%
    epss
  • 02 SEP 20:19Z
    Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6
    cvelistv5