CVE-2026-90473

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-90473
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90473.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-90473
Downstream
Published
2026-09-12T11:06:12Z
Modified
2026-09-14T03:46:32Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
msgpack-java through 0.9.12 Integer Overflow via MAP32
Details

msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90473.json"
}
References

Affected packages

Git / github.com/msgpack/msgpack-java

Affected ranges

Type
GIT
Repo
https://github.com/msgpack/msgpack-java
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ca3fa54c8dc3a020ab554a7289af0927bbbf1f62
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.9.12"
        },
        {
            "fixed": "0.9.12"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

0.*
0.7.0
0.7.0-M6
0.7.0-p4
0.7.0-p5
0.7.0-p6
0.7.0-p7
0.7.0-p8
0.7.0-p9
0.7.1
0.8.0
0.8.1
0.8.10
0.8.11
0.8.12
0.8.13
0.8.14
0.8.15
0.8.16
0.8.17
0.8.18
0.8.19
0.8.2
0.8.20
0.8.21
0.8.22
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
0.8.8
0.8.9
msgpack-0.*
msgpack-0.6.2
msgpack-0.6.4
msgpack-0.6.5
msgpack-0.6.6
msgpack-0.6.7
msgpack-0.6.8
v0.*
v0.8.15
v0.8.22
v0.8.23
v0.8.24
v0.9.0
v0.9.1
v0.9.10
v0.9.11
v0.9.2
v0.9.3
v0.9.4
v0.9.5
v0.9.6
v0.9.7
v0.9.8
v0.9.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90473.json"