CVE-2026-103472
restbed through 5.0.0 WebSocket Memory Exhaustion via Unbounded Frame Buffering
- State
- Published
- Severity
- 8.7 High
- Published
- Sep 30, 2026
- Updated
- Oct 1, 2026
- Reserved
- Sep 30, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
restbedCorvusoft |
|
References
- GitHub Issue #558issue-tracking
- https://github.com/Corvusoft/restbedproduct
- https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/web_socket_impl.cpp#L117technical-description
- VulnCheck Advisory: restbed through 5.0.0 WebSocket Memory Exhaustion via Unbounded Frame Bufferingthird-party-advisory
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