CVE-2026-85440

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Source
https://cve.org/CVERecord?id=CVE-2026-85440
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85440.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-85440
Published
2026-09-03T22:38:31.246Z
Modified
2026-09-05T03:48:30.205967994Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
MOOS core-moos through 10.4.0 MOOSDB Pre-Authentication Heap Overflow via Negative Packet Length
Details

MOOS core-moos through 10.4.0 contains a pre-authentication heap overflow vulnerability in MOOSCommPkt packet handling that allows remote attackers to write arbitrary data by declaring a negative packet length. Attackers can exploit the signed integer check in InflateTo() and negative size conversion in recv() to overflow a four-byte heap buffer during the HandShake phase before authentication.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85440.json",
    "cwe_ids": [
        "CWE-787"
    ]
}
References

Affected packages

Git / github.com/themoos/core-moos

Affected ranges

Type
GIT
Repo
https://github.com/themoos/core-moos
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
19d06a9aefc910b0504c2c8589b1403f3b6e77a8
Fixed
96c49c5cdda6e07ee734a5324e8d25ba5a7f2d7a
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "10.4.0"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

10.*
10.0.1-devel
10.0.2-devel
10.0.3-devel-candidate
Other
IvPCompatibility
PreProfilingmerge
v10.*
v10.0.4-alpha

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85440.json"