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2 vulnerabilities found for msgpack by shamaton
CVE-2026-32284 (GCVE-0-2026-32284)
Vulnerability from nvd – Published: 2026-03-26 19:40 – Updated: 2026-03-30 14:55
VLAI
Title
Denial of service in github.com/shamaton/msgpack
Summary
The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Impacted products
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"timestamp": "2026-03-30T14:04:12.686407Z",
"version": "2.0.3"
},
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}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-30T14:55:25.762Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"references": [
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"tags": [
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"url": "https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "affected",
"packageName": "github.com/shamaton/msgpack",
"product": "github.com/shamaton/msgpack",
"programRoutines": [
{
"name": "Unmarshal"
},
{
"name": "UnmarshalAsMap"
},
{
"name": "UnmarshalAsArray"
},
{
"name": "DecodeStructAsArray"
},
{
"name": "DecodeStructAsMap"
}
],
"vendor": "github.com/shamaton/msgpack"
},
{
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"packageName": "github.com/shamaton/msgpack/v2",
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"programRoutines": [
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{
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],
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{
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],
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],
"descriptions": [
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"value": "The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-125: Out-of-bounds Read",
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}
]
}
],
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"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://github.com/shamaton/msgpack/issues/59"
},
{
"url": "https://github.com/golang/vulndb/issues/4513"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-4513"
}
],
"title": "Denial of service in github.com/shamaton/msgpack"
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"dateReserved": "2026-03-11T16:38:46.556Z",
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"state": "PUBLISHED"
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CVE-2026-32284 (GCVE-0-2026-32284)
Vulnerability from cvelistv5 – Published: 2026-03-26 19:40 – Updated: 2026-03-30 14:55
VLAI
Title
Denial of service in github.com/shamaton/msgpack
Summary
The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
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],
"role": "CISA Coordinator",
"timestamp": "2026-03-30T14:04:12.686407Z",
"version": "2.0.3"
},
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}
}
],
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"dateUpdated": "2026-03-30T14:55:25.762Z",
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"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "affected",
"packageName": "github.com/shamaton/msgpack",
"product": "github.com/shamaton/msgpack",
"programRoutines": [
{
"name": "Unmarshal"
},
{
"name": "UnmarshalAsMap"
},
{
"name": "UnmarshalAsArray"
},
{
"name": "DecodeStructAsArray"
},
{
"name": "DecodeStructAsMap"
}
],
"vendor": "github.com/shamaton/msgpack"
},
{
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}
],
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},
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "affected",
"packageName": "github.com/shamaton/msgpack/v3",
"product": "github.com/shamaton/msgpack/v3",
"programRoutines": [
{
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},
{
"name": "UnmarshalAsMap"
},
{
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],
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}
],
"descriptions": [
{
"lang": "en",
"value": "The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack."
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],
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{
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{
"description": "CWE-125: Out-of-bounds Read",
"lang": "en"
}
]
}
],
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},
{
"url": "https://github.com/golang/vulndb/issues/4513"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-4513"
}
],
"title": "Denial of service in github.com/shamaton/msgpack"
}
},
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