CVE-2026-43868
Description
A flaw was found in Apache Thrift. This vulnerability involves a Memory Allocation with Excessive Size Value, which could allow an attacker to trigger resource exhaustion. By providing an overly large size value during memory allocation, an attacker can cause the affected system to become unresponsive, leading to a Denial of Service (DoS).
Statement
This is an Important denial of service flaw in Apache Thrift, allowing an unauthenticated remote attacker to exhaust system resources. By sending specially crafted requests with excessive size values, an attacker can cause memory allocation failures, leading to system unresponsiveness. This poses a significant risk to the availability of services utilizing vulnerable Apache Thrift implementations.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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 | 7.5 | N/A | 5.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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