# CVE-2026-54135

## Summary

- **CVE ID:** CVE-2026-54135
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-400, CWE-770
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## Description

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.

## Affected Products

- SimulPiscator — AirSane (< 0.4.12)

## References

- [CNA](https://github.com/SimulPiscator/AirSane/security/advisories/GHSA-p5hv-3m79-452q)
- [CNA](https://github.com/SimulPiscator/AirSane/commit/129cc3bf7258251a0a694dee7741285b59d88f9f)
- [CNA](https://github.com/SimulPiscator/AirSane/releases/tag/v0.4.12)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.55%
- **EPSS Percentile:** 44.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._