High severity · published Oct 9, 2025
CVE-2025-11573
Denial of Service issue in Amazon.IonDotnet
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AM
Amazon.IonDotnet · Amazon
before 1.3.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11573
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11573
aws.amazon.com
https://aws.amazon.com/security/security-bulletins/AWS-2025-022/
github.com
https://github.com/amazon-ion/ion-dotnet/releases/tag/v1.3.2
github.com
https://github.com/amazon-ion/ion-dotnet/security/advisories/GHSA-q5r6-9qwq-g2wj