CVE-2026-103471

Summary

The restbed library fails to enforce maximum size limits on HTTP request headers, allowing attackers to stream unlimited data without sending header delimiters, leading to unbounded heap memory allocation and potential server memory exhaustion.

Exploitability

Exploitation is straightforward for remote unauthenticated attackers who can open TCP connections and stream data indefinitely, with no special preconditions required beyond network access to the vulnerable service.

Blast radius

The impact could be significant across any application using restbed 5.0.0 or earlier, potentially causing widespread service disruption through memory exhaustion attacks that are difficult to detect until they've already occurred.

Detection

Monitor for abnormal memory usage patterns in processes using restbed, particularly sudden increases in heap allocation or process restarts due to memory exhaustion, though no specific log entries or network indicators are mentioned in the description.

Prioritized remediation

Upgrade to restbed version 5.0.1 or later to address the header buffer size limitation issue.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.