CVE-2026-103471restbed through 5.0.0 Denial of Service via Unbounded Header Buffering
Updated under an hour ago ()
Does this affect you?
It affects Corvusoft restbed. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.55%, higher than 45% of scored CVEs.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.55% (percentile 45)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Corvusoft restbed corvusoft:restbed (from the name) | through 5.0.0 | CNA record |
References
- https://github.com/Corvusoft/restbed/issues/558issue-tracking
- https://github.com/Corvusoft/restbedproduct
- https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/service_impl.cpp#L554technical-description
- https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/session.cpp#L200technical-description
- https://www.vulncheck.com/advisories/restbed-through-5.0.0-denial-of-service-via-unbounded-header-bufferingthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.