Description
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.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| msgpack | msgpack-python | affected |
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Remediation
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Tracking
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Advisories
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References
History
Tue, 30 Jun 2026 22:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | MessagePack: Out-of-bounds read/crash on Unpacker reuse after caught error | |
| Weaknesses | CWE-416 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-30T21:36:23.418Z
Reserved: 2026-06-24T18:49:56.209Z
Link: CVE-2026-57585
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses
-
CWE-416
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