CVE-2026-106972 Details
Description
Uncontrolled recursion in MessagePack\BufferUnpacker::unpack() in rybakit/msgpack versions prior to 0.11.0 allows attackers to cause a denial of service through memory exhaustion when an application decodes deeply nested, attacker-controlled MessagePack input.
A denial-of-service vulnerability has been identified in the MessagePack BufferUnpacker component of rybakit/msgpack version 0.11.0. This vulnerability arises from uncontrolled recursion in the unpacking process, allowing attackers to cause memory exhaustion and terminate the application. The issue occurs when the unpacker decodes nested MessagePack containers without a maximum depth limit, leading to excessive memory allocation and process termination.
Users can upgrade to rybakit/msgpack version 0.11.0 or later, which introduces a maximum nesting depth limit in the unpacker and raises an UnpackingFailedException when the limit is exceeded.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 28, 2026CISA-ADP
Assessed Oct 30, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/diptendukar/security-advisories/blob/main/CVE-2026-106972.md | CISA-ADP | AdvisoryExploit |
| https://github.com/diptendukar/security-advisories/blob/main/CVE-2026-106972.md | [email protected] | AdvisoryExploit |
| https://github.com/rybakit/msgpack.php | [email protected] | Vendor |
| https://github.com/rybakit/msgpack.php/releases/tag/v0.11.0 | [email protected] | Release NotesVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-674 | Uncontrolled Recursion | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| rybakit/msgpack | < 0.11.0 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 30, 2026 | CVE Modified | CISA-ADP |
| Oct 29, 2026 | CVE Modified | [email protected] |
| Oct 28, 2026 | New CVE Received | [email protected] |