themoos core-moos up to 10.4.0 Packet InflateTo heap-based overflow

Summaryinfo

A vulnerability was found in themoos core-moos up to 10.4.0 and classified as critical. This affects the function InflateTo of the component Packet Handler. Executing a manipulation can lead to heap-based overflow. This vulnerability is handled as CVE-2026-85440. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in themoos core-moos up to 10.4.0. It has been declared as critical. This vulnerability affects the function InflateTo of the component Packet Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-85440 since 09/03/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/04/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• themoos

Name

• core-moos

Version

• 10.0
• 10.1
• 10.2
• 10.3
• 10.4.0

Website

• Product: https://github.com/themoos/core-moos/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion