Resource exhaustion in Corvusoft Restbed
CVE-2026-103471
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Corvusoft/restbed/issues/558 (issue-tracking)
- github.com/Corvusoft/restbed (product)
- github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/… (technical-description)
- github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/… (technical-description)
- www.vulncheck.com/advisories/restbed-through-5.0.0-denial-of-service-via-unboun… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103471?
- CVE-2026-103471 is a high-severity vulnerability in Corvusoft Restbed, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-30.
- How severe is CVE-2026-103471?
- High severity. CVSS v3 base score is 7.5 out of 10.