MarlinFirmware/Marlin

GitHub

github.com

marlinfw.org

Releases101

Frequency1 month 3 weeks

Last Release 3 months ago

Stars17.4K

Marlin is a firmware for RepRap 3D printers optimized for both 8 and 32 bit microcontrollers. Marlin supports all common platforms. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.

CVE History

CVE	Published	CVSS v3	CVSS v2
CVE-2026-56111 ↗	Jun 24, 2026Wednesday, 24 June 2026, 16:16	9.1 CRITICAL	—
Marlin Firmware through 2.1.2.7, fixed in commit 1f255d1, when built with MESH_BED_LEVELING enabled, contains an out-of-bounds write vulnerability in the M421 G-code handler that allows attackers to corrupt firmware memory by supplying out-of-range X and Y grid indices. Attackers can send a single crafted G-code command via USB serial, network interface, or malicious gcode file to write an attacker-controlled 32-bit float value past the z_values array bounds, corrupting adjacent firmware variables and causing denial of service or firmware state corruption.
CVE-2018-1000537 ↗	Jun 26, 2018Tuesday, 26 June 2018, 16:29	—	7.5 HIGH
Marlin Firmware Marlin version 1.1.x and earlier contains a Buffer Overflow vulnerability in cardreader.cpp (Depending on branch/version) that can result in Arbitrary code execution. This attack appear to be exploitable via Crafted G-Code instruction/file is sent to the printer.