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2 vulnerabilities found for moxygen by Meta Platforms, Inc
CVE-2026-84894 (GCVE-0-2026-84894)
Vulnerability from nvd – Published: 2026-09-28 18:40 – Updated: 2026-09-30 15:05
VLAI
EPSS
VEX
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 15:05 UTC
CWE
- Use After Free (CWE-416)
- CWE-416 - Use After Free
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.facebook.com/security/advisories/cve-… | x_refsource_CONFIRM |
| https://github.com/facebookexperimental/moxygen/c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Meta Platforms, Inc | moxygen |
Affected:
b24f8e65cb83ebe5f3880cc4e3a4c8f64e1882f9 , < 004123dd24c30dad6b649163575145f240dabc94
(git)
|
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"timestamp": "2026-09-30T15:05:21.880556Z",
"version": "2.0.3"
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"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
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],
"cna": {
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}
],
"dateAssigned": "2026-09-02T00:00:00.000Z",
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}
],
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"shortName": "Meta"
},
"references": [
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],
"url": "https://www.facebook.com/security/advisories/cve-2026-84894"
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"url": "https://github.com/facebookexperimental/moxygen/commit/004123dd24c30dad6b649163575145f240dabc94"
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},
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CVE-2026-84894 (GCVE-0-2026-84894)
Vulnerability from cvelistv5 – Published: 2026-09-28 18:40 – Updated: 2026-09-30 15:05
VLAI
EPSS
VEX
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 15:05 UTC
CWE
- Use After Free (CWE-416)
- CWE-416 - Use After Free
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.facebook.com/security/advisories/cve-… | x_refsource_CONFIRM |
| https://github.com/facebookexperimental/moxygen/c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Meta Platforms, Inc | moxygen |
Affected:
b24f8e65cb83ebe5f3880cc4e3a4c8f64e1882f9 , < 004123dd24c30dad6b649163575145f240dabc94
(git)
|
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"confidentialityImpact": "HIGH",
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"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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"role": "CISA Coordinator",
"timestamp": "2026-09-30T15:05:21.880556Z",
"version": "2.0.3"
},
"type": "ssvc"
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],
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"description": "CWE-416 Use After Free",
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],
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"dateUpdated": "2026-09-30T15:05:50.817Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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"defaultStatus": "unaffected",
"product": "moxygen",
"vendor": "Meta Platforms, Inc",
"versions": [
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"status": "affected",
"version": "b24f8e65cb83ebe5f3880cc4e3a4c8f64e1882f9",
"versionType": "git"
}
]
}
],
"dateAssigned": "2026-09-02T00:00:00.000Z",
"descriptions": [
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}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Use After Free (CWE-416)",
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],
"providerMetadata": {
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"orgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827",
"shortName": "Meta"
},
"references": [
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"tags": [
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],
"url": "https://www.facebook.com/security/advisories/cve-2026-84894"
},
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],
"url": "https://github.com/facebookexperimental/moxygen/commit/004123dd24c30dad6b649163575145f240dabc94"
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},
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