High 7.5Published Oct 9, 2025

CVE-2025-11573Denial of Service issue in Amazon.IonDotnet

Updated under an hour ago (Oct 27, 2026, 9:40 PM ET)

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It affects Amazon.IonDotnet. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Amazon.IonDotnet

Exploited in the last 30 days

An infinite loop issue in Amazon.IonDotnet library versions <v1.3.2 may allow a threat actor to cause a denial of service through a specially crafted text input. To mitigate this issue, users should upgrade to version v1.3.2. As of August 20, 2025, this library has been deprecated and will not receive further updates.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-1286
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: AMZN
NVD analysis: Deferred
Record last updated: Oct 9, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Amazon Amazon.IonDotnet amazon:amazon.iondotnet (from the name)	before 1.3.2	CNA record

References

References

https://github.com/amazon-ion/ion-dotnet/releases/tag/v1.3.2	patch, product
https://aws.amazon.com/security/security-bulletins/AWS-2025-022/	vendor-advisory
https://github.com/amazon-ion/ion-dotnet/security/advisories/GHSA-q5r6-9qwq-g2wj	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.