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VULNERABILITIES

CVE-2026-84894 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

In moxygen before commit 004123dd24c3, MoQSession::dataStreamReadLoop keeps using a stream read handle after reading a FIN, which invalidates the handle under proxygen's WebTransport API. A remote peer can trigger the stale use by opening a data stream that names an unknown track alias and carries the FIN in the same write.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CNA: CISA-ADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/facebookexperimental/moxygen/commit/004123dd24c30dad6b649163575145f240dabc94 [email protected]Source CodeVendor
https://www.facebook.com/security/advisories/cve-2026-84894 [email protected]AdvisoryVendor

Weakness Enumeration

CWE-IDCWE NameSource
CWE-416Use After FreeCISA-ADP

Affected Products

ProductVersions
Facebook moxygen
>= b24f8e65cb83ebe5f3880cc4e3a4c8f64e1882f9, < 004123dd24c30dad6b649163575145f240dabc94

CPE

  • No CPEs found in CPE dictionary for this product.

Remediation

  • No remediation found in references.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-84894
NVD Published Date:
Sep 28, 2026
NVD Last Modified:
Sep 30, 2026
Source:
[email protected]
CVE-2026-84894 Details - Not Deferred