SimulPiscator AirSane up to 0.4.11 httpserver.cpp content memory allocation

Summaryinfo

A vulnerability labeled as problematic has been found in SimulPiscator AirSane up to 0.4.11. Affected by this vulnerability is the function HttpServer::Request::content of the file httpserver.cpp. Executing a manipulation can lead to memory allocation. This vulnerability is tracked as CVE-2026-54135. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in SimulPiscator AirSane up to 0.4.11. It has been declared as problematic. This vulnerability affects the function HttpServer::Request::content of the file httpserver.cpp. The manipulation with an unknown input leads to a memory allocation vulnerability. The CWE definition for the vulnerability is CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. As an impact it is known to affect availability. CVE summarizes:

AirSane is a SANE frontend, and a scanner server that supports Apple's AirScan protocol. Versions prior to 0.4.12 have a vulnerability in the custom HTTP server implementation of AirSane that allows a remote unauthenticated attacker to cause a Denial of Service (DoS) via memory exhaustion (OOM). In httpserver.cpp, the HttpServer::Request::content function reads the Content-Length header and directly passes this value to std::string::resize() without any upper-bound validation or safe parsing. An attacker can send an HTTP POST request with an artificially large Content-Length value. This forces the daemon to attempt allocating gigabytes of memory, resulting in a std::bad_alloc exception and immediately crashing the AirSane process. Additionally, providing non-numeric characters in the Content-Length header leads to undefined behavior (NaN to integer conversion) due to the lack of error handling during header parsing. Version 0.4.12 patches the issue.

The advisory is available at github.com. This vulnerability was named CVE-2026-54135 since 06/11/2026. 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.

Upgrading to version 0.4.12 eliminates this vulnerability.

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Productinfo

Vendor

• SimulPiscator

Name

• AirSane

Version

• 0.4.0
• 0.4.1
• 0.4.2
• 0.4.3
• 0.4.4
• 0.4.5
• 0.4.6
• 0.4.7
• 0.4.8
• 0.4.9
• 0.4.10
• 0.4.11

Website

• Product: https://github.com/SimulPiscator/AirSane/

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