CVE-2026-90557
Freeciv versions 3.1.0 through 3.2.5 contain an out-of-bounds read vulnerability in sg_load_player_unit() when processing savegame files with invalid unit activity indices. An attacker can craft a malicious savegame file with an out-of-range activity index that bypasses bounds checking and causes a crash or limited heap memory exposure when loaded.
- Published Sep 12, 2026
- CVSS 6.9 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available