CVE-2026-14739
Description
A flaw was found in DBI for Perl. This vulnerability, a heap overflow, occurs when the software attempts to preparse SQL statements containing an extremely large number of placeholders. This could allow a remote attacker to cause a denial of service or potentially execute arbitrary code.
Statement
This vulnerability in DBI for Perl is rated as Important. A heap overflow can occur when processing SQL statements with an exceptionally large number of placeholders, potentially leading to a denial of service or arbitrary code execution. While requiring an extreme number of placeholders, this flaw could impact applications utilizing DBI in Red Hat environments that handle untrusted or maliciously crafted SQL queries.
Mitigation
Applications utilizing `perl-DBI` should implement robust input validation and limit the number of parameters used in SQL query placeholders, particularly when processing untrusted data. This operational control can prevent the construction of SQL statements with an excessive number of placeholders, thereby reducing the risk of triggering the heap overflow vulnerability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.1 | N/A | 9.8 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Integrity,Availability,Confidentiality
Technical Impact: DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands; Read Memory; Modify Memory
If the incorrect calculation is used in the context of memory allocation, then the software may create a buffer that is smaller or larger than expected. If the allocated buffer is smaller than expected, this could lead to an out-of-bounds read or write (CWE-119), possibly causing a crash, allowing arbitrary code execution, or exposing sensitive data.
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