CVE-2026-103472

restbed through 5.0.0 WebSocket Memory Exhaustion via Unbounded Frame Buffering

Published Sep 30, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Corvusoft
Corvusoft restbed
Vendors & Products Corvusoft
Corvusoft restbed
Type Values Removed Values Added
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.
Title restbed through 5.0.0 WebSocket Memory Exhaustion via Unbounded Frame Buffering
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 1, 2026, 6:00 PM
Reserved
Sep 30, 2026, 4:02 PM
Status
Deferred
Published
Sep 30, 2026, 6:18 PM
Modified
Oct 1, 2026, 7:17 PM