ubuntu-cve-2026-57585
Vulnerability from osv_ubuntu
Published
2026-06-30 22:16
Modified
2026-06-30 22:16
Summary
Details
MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
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},
{
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}
]
},
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},
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}
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"1.5.4-1ubuntu4+esm1",
"1.5.4-1ubuntu4+esm2",
"1.5.4-1ubuntu4+esm3",
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]
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{
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]
},
{
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"9.0.1-2.3~ubuntu1.18.04.6",
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},
{
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}
]
},
"package": {
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"name": "python-msgpack",
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},
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},
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"18.1-5build1",
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{
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},
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"22.0.2+dfsg-1ubuntu0.7+esm3"
]
},
{
"ecosystem_specific": {
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"binary_version": "1.0.3-3build2"
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]
},
"package": {
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"name": "python-msgpack",
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},
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},
"package": {
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{
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"package": {
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"24.0+dfsg-1ubuntu1.1",
"24.0+dfsg-1ubuntu1.2",
"24.0+dfsg-1ubuntu1.3",
"24.0+dfsg-1ubuntu1.3+esm1",
"24.0+dfsg-1ubuntu1.3+esm2",
"24.0+dfsg-1ubuntu1.3+esm3"
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},
{
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{
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]
},
"package": {
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"name": "python-msgpack",
"purl": "pkg:deb/ubuntu/python-msgpack@1.0.3-3build4?arch=source\u0026distro=questing"
},
"ranges": [
{
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{
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},
"package": {
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"name": "python-pip",
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{
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},
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{
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},
{
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},
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"name": "python-srsly",
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{
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{
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},
{
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"binary_version": "25.1.1+dfsg-1ubuntu2+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "python-pip",
"purl": "pkg:deb/ubuntu/python-pip@25.1.1+dfsg-1ubuntu2+esm3?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
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],
"type": "ECOSYSTEM"
}
],
"versions": [
"25.1.1+dfsg-1ubuntu2",
"25.1.1+dfsg-1ubuntu2+esm1",
"25.1.1+dfsg-1ubuntu2+esm2",
"25.1.1+dfsg-1ubuntu2+esm3"
]
}
],
"aliases": [],
"details": "MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1.",
"id": "UBUNTU-CVE-2026-57585",
"modified": "2026-06-30T22:16:00Z",
"published": "2026-06-30T22:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-57585"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-57585"
},
{
"type": "REPORT",
"url": "https://github.com/msgpack/msgpack-python/commit/2c56ddb5d0025ed481d962c0f5d62d19dec7476d"
},
{
"type": "REPORT",
"url": "https://github.com/msgpack/msgpack-python/security/advisories/GHSA-6v7p-g79w-8964"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-57585"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
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- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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