CVE-2026-103472
restbed through 5.0.0 WebSocket Memory Exhaustion via Unbounded Frame Buffering
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | corvusoft |
| Product | restbed |
| Published | Sep 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Corvusoft / restbed
0 ≤ 5.0.0
References
github.com: https://github.com/Corvusoft/restbed/issues/558 github.com: https://github.com/Corvusoft/restbed github.com: https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/web_socket_impl.cpp#L117 vulncheck.com: https://www.vulncheck.com/advisories/restbed-through-5.0.0-websocket-memory-exhaustion-via-unbounded-frame-buffering
Credits
MJ DHURGESH