CVE intelligence and bounded remediation

CVE-2025-11230 — Haproxy Aloha Appliance security vulnerability

High CVSS 7.5

Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.

Severity
High
CVSS
7.5 (3.1)
Published
2025-11-19
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-407

Affected products

  • haproxy / aloha_appliance
  • haproxy / haproxy
  • haproxy / haproxy_enterprise / 2.4r1

Showing 3 representative product identities from 200 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

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Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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