Medium severity · published Sep 12, 2026
CVE-2026-90557
Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
freeciv · freeciv
3.1.0 before 3.2.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90557
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90557
github.com
https://github.com/freeciv/freeciv
github.com
https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L4282
github.com
https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c#L6108
github.com
https://github.com/freeciv/freeciv/commit/ef0c76c2765fe383140eb1a70dbea1228844152e
github.com
https://github.com/freeciv/freeciv/releases/tag/R3_2_6
redmine.freeciv.org
https://redmine.freeciv.org/issues/2162
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