CVE-2026-16632 (GCVE-0-2026-16632)
Vulnerability from cvelistv5 – Published: 2026-07-22 23:45 – Updated: 2026-07-23 15:36
VLAI
EPSS
VEX
Title
boazsegev facil.io WebSocket Frame websocket_parser.h websocket_on_protocol_error input validation
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 15:34 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/382382 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/382382/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-16632 | third-party-advisory |
| https://vuldb.com/submit/860585 | third-party-advisory |
| https://github.com/boazsegev/facil.io/issues/169 | exploitissue-tracking |
| https://github.com/boazsegev/facil.io/ | product |
Impacted products
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.