---
cve: "CVE-2026-90557"
severity: "MEDIUM"
cvss: 6.9
epss: "0.1%"
vendor: "freeciv"
kev: false
exploited: false
published: "2026-09-12 18:16:44"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T12:56:11+02:00"
---

# CVE-2026-90557

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 2c4304c742aa81f1d73a5d604ed83237d57804a1 (Commit)

## Referenzen

- <https://github.com/freeciv/freeciv/commit/ef0c76c2765fe383140eb1a70dbea1228844152e>
- <https://github.com/freeciv/freeciv>
- <https://redmine.freeciv.org/issues/2162>
- <https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c#L6108>
- <https://github.com/freeciv/freeciv/releases/tag/R3_2_6>
- <https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L4282>
- <https://www.vulncheck.com/advisories/freeciv-3.1.0-through-3.2.5-out-of-bounds-read-via-savegame>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-90557) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_