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CVE-2026-84851— Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6

Quick assessment

Affected
Amazon ion-c
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Amazon Ion-C 版本低于 1.1.6 存在一个非受控递归问题，使得远程未认证的攻击者能够构造特殊的 Ion 数据，耗尽本地调用栈并导致使用该库的应用程序崩溃，从而造成服务拒绝（DoS）。

CVSS 7.5 · High
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I. Basic Information for CVE-2026-84851

Vulnerability Information
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Vulnerability Title
Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Amazon ion-c 0 ~ 1.1.6 -

II. Public POCs for CVE-2026-84851

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III. Intelligence Information for CVE-2026-84851

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Vendor Advisories for CVE-2026-84851 (2)

Vendor Pages for CVE-2026-84851 (1)

IV. Related Vulnerabilities

Same product: ion-c
Same vendor: Amazon
Same weakness: CWE-674

V. Comments for CVE-2026-84851

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