SB20260919177 - Multiple vulnerabilities in IBM Db2 Developer Extension
Published: September 19, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Input validation error (CVE-ID: CVE-2026-49458)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary script in the victim's browser.
The vulnerability exists due to improper input validation in the IN_PLACE sanitization logic when processing markup across realms. A remote attacker can supply specially crafted markup that bypasses realm-bound instanceof checks to execute arbitrary script in the victim's browser.
User interaction is required to process the crafted content.
2) Cross-site scripting (CVE-ID: CVE-2026-49459)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
The vulnerability allows a remote attacker to execute arbitrary script code in the victim's browser.
The vulnerability exists due to improper neutralization of script-related html attributes in the in_place mode root element handling when sanitizing attacker-controlled root dom content. A remote attacker can supply a crafted root element whose clobbered attributes are preserved to execute arbitrary script code in the victim's browser.
User interaction is required to load or process the crafted content.
3) Cross-site scripting (CVE-ID: CVE-2026-49978)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
The vulnerability allows a remote attacker to execute arbitrary script in the victim's browser.
The vulnerability exists due to cross-site scripting in template content sanitization when processing HTML containing a template element with an attached shadow root inside template.content. A remote attacker can supply crafted HTML that survives sanitization to execute arbitrary script in the victim's browser.
Exploitation occurs when the application clones the template and inserts the result into the page.
Remediation
Install update from vendor's website.