Security Bulletin
Summary
Db2 for IBM i JSON Store Technology Preview is vulnerable to a denial of service when using the toFixed() function [CVE-2025-66453] as described in the vulnerability details section.
Vulnerability Details
CVEID: CVE-2025-66453
DESCRIPTION: Rhino is an open-source implementation of JavaScript written entirely in Java. Prior to 1.8.1, 1.7.15.1, and 1.7.14.1, when an application passed an attacker controlled float poing number into the toFixed() function, it might lead to high CPU consumption and a potential Denial of Service. Small numbers go through this call stack: NativeNumber.numTo DToA.JS_dtostr DToA.JS_dtoa DToA.pow5mult where pow5mult attempts to raise 5 to a ridiculous power. This vulnerability is fixed in 1.8.1, 1.7.15.1, and 1.7.14.1.
CWE: CWE-400: Uncontrolled Resource Consumption
CVSS Source: security-advisories@github.com
CVSS Base score: 5.5
CVSS Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
Affected Products and Versions
| Affected Product(s) | Affected Product Version(s) | Affected Product Feature(s) or License Program Product(s) |
| IBM i | 7.4 | 5770-SS1 |
| IBM i | 7.3 | 5770-SS1 |
| IBM i | 7.2 | 5770-SS1 |
Remediation/Fixes
| IBM i Release | 5770-SS1 PTF Number(s) | PTF Download Link(s) |
| 7.4 | SJ08547 | https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08547 |
| 7.3 | SJ08546 | https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08546 |
| 7.2 | SJ08545 | https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08545 |
IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
17 Feb 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.
Document Location
Worldwide
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Document Information
Modified date:
17 February 2026
Initial Publish date:
17 February 2026
UID
ibm17261107