IBM Db2 DoS via query logic with special elements before 11.5.9/12.1.4
CVE-2026-1577 Published on April 30, 2026

IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving multiple subqueries
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-1577 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Products Associated with CVE-2026-1577

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IBM Db2
 

Affected Versions

IBM Db2:

Exploit Probability

EPSS
0.04%
Percentile
11.74%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.