CVE-2026-16632: Improper Input Validation in boazsegev facil.io
CVE-2026-16632 is a medium severity vulnerability in boazsegev facil.io up to version 0.7.4. It involves improper input validation in the WebSocket Frame Parser component, specifically in the websocket_on_protocol_error function. This flaw allows remote attackers to manipulate the on_message argument, potentially leading to unexpected behavior. The vulnerability has been publicly disclosed, and an exploit is available, but no official fix or patch has been released yet.
AI Analysis
Technical Summary
The vulnerability CVE-2026-16632 affects the websocket_on_protocol_error function within the WebSocket Frame Parser of boazsegev facil.io versions 0.7.0 through 0.7.4. Improper input validation occurs due to manipulation of the on_message argument, which can be exploited remotely. The issue was reported early to the project, but no response or remediation has been provided. The CVSS 4.0 base score is 6.9, indicating a medium severity with network attack vector, no privileges or user interaction required, and low to limited impact on confidentiality, integrity, and availability.
Potential Impact
An attacker can remotely exploit this vulnerability by sending crafted input that manipulates the on_message argument in the WebSocket Frame Parser, potentially causing improper input validation. This may lead to unexpected application behavior or security issues related to WebSocket message handling. The exact impact beyond improper validation is not detailed in the provided information.
Mitigation Recommendations
No official fix or patch is currently available for this vulnerability. Since the vendor has not responded or released a remediation, users should monitor the vendor's channels for updates. Until a patch is released, consider implementing network-level controls to restrict untrusted WebSocket connections or applying application-layer mitigations if feasible.
CVE-2026-16632: Improper Input Validation in boazsegev facil.io
Description
CVE-2026-16632 is a medium severity vulnerability in boazsegev facil.io up to version 0.7.4. It involves improper input validation in the WebSocket Frame Parser component, specifically in the websocket_on_protocol_error function. This flaw allows remote attackers to manipulate the on_message argument, potentially leading to unexpected behavior. The vulnerability has been publicly disclosed, and an exploit is available, but no official fix or patch has been released yet.
CVSS v4.0
Score 6.9medium
Affected software
pkg:github/boazsegev/facil.iocpe:2.3:a:boazsegev:facil.io:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-16632 affects the websocket_on_protocol_error function within the WebSocket Frame Parser of boazsegev facil.io versions 0.7.0 through 0.7.4. Improper input validation occurs due to manipulation of the on_message argument, which can be exploited remotely. The issue was reported early to the project, but no response or remediation has been provided. The CVSS 4.0 base score is 6.9, indicating a medium severity with network attack vector, no privileges or user interaction required, and low to limited impact on confidentiality, integrity, and availability.
Potential Impact
An attacker can remotely exploit this vulnerability by sending crafted input that manipulates the on_message argument in the WebSocket Frame Parser, potentially causing improper input validation. This may lead to unexpected application behavior or security issues related to WebSocket message handling. The exact impact beyond improper validation is not detailed in the provided information.
Mitigation Recommendations
No official fix or patch is currently available for this vulnerability. Since the vendor has not responded or released a remediation, users should monitor the vendor's channels for updates. Until a patch is released, consider implementing network-level controls to restrict untrusted WebSocket connections or applying application-layer mitigations if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-07-22T16:13:01.618Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6157c79c2644c7f8e5859f
Added to database: 07/22/2026, 23:52:39 UTC
Last enriched: 07/23/2026, 00:08:11 UTC
Last updated: 07/23/2026, 00:14:55 UTC
Views: 18
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