CVE-2026-103471 restbed through 5.0.0 Denial of Service via Unbounded Header Buffering
Remote attackers can exhaust server memory by streaming indefinite HTTP headers, causing a denial of service in applications using the restbed library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103471?
CVE-2026-103471 is a high-severity denial of service vulnerability in Corvusoft restbed, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory. Attackers can open TCP connections and stream bytes indefinitely without sending the header delimiter, forcing the server to allocate unbounded heap memory until the process is killed.
Weakness: CWE-770
Which versions are affected by CVE-2026-103471?
How do I fix CVE-2026-103471?
No fix has been published for CVE-2026-103471 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-103471 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103471 exists.
Sources
Also known as GHSA-7gq6-qjjv-fgjh.