CVE-2026-84851

high

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 th…

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.

CVSS

7.5

7.5 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (ff89ba41-3aa1-4d27-914a-91399e9639e5)

Timeline (UTC)

Published: 2026-09-03 05:16

Modified: 2026-09-03 16:44

NVD status: Awaiting Analysis

Last synced 1 day ago

Verified against the source API 2026-10-27 06:50 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-674

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://aws.amazon.com/security/security-bulletins/2026-094-aws/ ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6 ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44 ff89ba41-3aa1-4d27-914a-91399e9639e5

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:50 UTC · record ↗

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