CVE-2026-16632

boazsegev facil.io WebSocket Frame websocket_parser.h websocket_on_protocol_error input validation

MEDIUM 5.5EPSS 0.5%

A flaw has been found in boazsegev facil.io up to 0.7.4. Affected is the function websocket_on_protocol_error in the library lib/facil/http/parsers/websocket_parser.h of the component WebSocket Frame Parser. This manipulation of the argument on_message causes improper input validation. The attack can be initiated remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected: boazsegev · facil.io
CVSS v4.0 VULDB: 5.5 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 VULDB: 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v2.0 VULDB: 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS: 0.52% chance of exploitation in the next 30 days, 43rd percentile
Published: 2026-07-22
Updated: 2026-07-23

Proof-of-concept exploits (1)

boazsegev/facil.io/issues/1692408★ · 2026-04-14

CVE-2026-16632

Proof-of-concept exploits (1)

References

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