boazsegev facil.io up to 0.7.4 WebSocket Frame Parser websocket_parser.h websocket_on_protocol_error on_message input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k2.02

Summaryinfo

A vulnerability classified as critical was found in boazsegev facil.io up to 0.7.4. Affected by this vulnerability is the function websocket_on_protocol_error in the library lib/facil/http/parsers/websocket_parser.h of the component WebSocket Frame Parser. Such manipulation of the argument on_message leads to input validation. This vulnerability is uniquely identified as CVE-2026-16632. The attack can be launched remotely. Moreover, an exploit is present. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability was found in boazsegev facil.io up to 0.7.4. It has been rated as critical. Affected by this issue is the function websocket_on_protocol_error in the library lib/facil/http/parsers/websocket_parser.h of the component WebSocket Frame Parser. The manipulation of the argument on_message with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-16632. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/22/2026 Advisory disclosed
07/22/2026 +0 days VulDB entry created
07/22/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 169
Status: Not defined

CVE: CVE-2026-16632 (🔒)
GCVE (CVE): GCVE-0-2026-16632
GCVE (VulDB): GCVE-100-382382
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/22/2026 18:18
Changes: 07/22/2026 18:18 (59)
Complete: 🔍
Submitter: Fantasy_2026
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #860585: facil.io <= 0.7.4 Improper Input Validation (by Fantasy_2026)

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