CVE-2026-103472restbed through 5.0.0 WebSocket Memory Exhaustion via Unbounded Frame 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 0.44%, higher than 36% of scored CVEs.
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restbed through 5.0.0 accepts WebSocket frames with declared payload lengths up to 2^63 bytes and buffers the payload without size limits in an unbounded stream buffer. Remote unauthenticated attackers can declare large frame sizes and stream payload data to exhaust server memory, causing denial of service through process crash.
- 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)
- 0.44% (percentile 36)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 1, 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/web_socket_impl.cpp#L117technical-description
- https://www.vulncheck.com/advisories/restbed-through-5.0.0-websocket-memory-exhaustion-via-unbounded-frame-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.