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CVE-2026-3303— IBM Concert Software Permissive Cross-domain Security Policy

Quick assessment

Affected
IBM Concert
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM Concert 1.0 至 3.0.0 版本使用了跨域资源共享（CORS）功能，但由于未将域名限制为仅受信任的域，攻击者可能借此执行特权操作。

CVSS 3.7 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-3303

Vulnerability Information
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Vulnerability Title
IBM Concert Software Permissive Cross-domain Security Policy
Source: CVE Program / CVE List V5
Vulnerability Description
IBM Concert 1.0 through 3.0.0 uses cross-origin resource sharing (CORS) which could allow an attacker to carry out privileged actions as the domain name is not being limited to only trusted domains.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过度许可的跨域白名单
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM Concert 1.0.0 ~ 3.0.0 -

II. Public POCs for CVE-2026-3303

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III. Intelligence Information for CVE-2026-3303

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Other References for CVE-2026-3303 (1)

Same Patch Batch · IBM · 2026-10-19 · 29 CVEs total

CVE-2026-10572 8.8 HIGH IBM MQ Buffer Overflow
CVE-2026-10574 8.8 HIGH IBM MQ Buffer Overflow
CVE-2026-10743 8.8 HIGH IBM MQ Race Condition
CVE-2026-12665 8.1 HIGH IBM MQ Buffer Overflow
CVE-2026-12148 7.5 HIGH IBM MQ Deserialization of Untrusted Data
CVE-2026-6719 7.5 HIGH IBM Concert Software Use of Insufficiently Random Values
CVE-2026-3295 7.4 HIGH IBM Cloud Pak System Cross-Site Scripting
CVE-2026-12350 6.5 MEDIUM IBM MQ Deserialization of Untrusted Data
CVE-2026-12343 6.5 MEDIUM IBM MQ Denial of Service
CVE-2026-12155 6.5 MEDIUM IBM MQ Deserialization of Untrusted Data
CVE-2026-11829 6.5 MEDIUM IBM MQ Buffer Overflow
CVE-2026-14511 6.5 MEDIUM IBM MQ Denial of Service
CVE-2023-38375 6.1 MEDIUM IBM Cloud Pak System Cross-Site Scripting
CVE-2026-4413 6.1 MEDIUM IBM Concert Software Cross-Site Scripting
CVE-2026-3161 5.9 MEDIUM IBM Cloud Pak System Risky Cryptographic Algorithm
CVE-2026-11828 5.9 MEDIUM IBM MQ Buffer Overflow
CVE-2026-11831 5.4 MEDIUM IBM MQ Heap-based Buffer Overflow
CVE-2026-4418 5.4 MEDIUM IBM Cloud Pak System HTML Injection
CVE-2026-15661 5.3 MEDIUM IBM Concert Software Improper Output Neutralization for Logs
CVE-2026-3628 5.3 MEDIUM IBM Concert Software Information Disclosure

Showing top 20 of 29 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Concert
Same vendor: IBM
Same weakness: CWE-942

V. Comments for CVE-2026-3303

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