---
cve: "CVE-2026-77652"
severity: "HIGH"
cvss: 7.8
epss: "0.2%"
vendor: "Gnome"
kev: false
exploited: false
published: "2026-08-26 19:21:39"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T23:09:02+02:00"
---

# CVE-2026-77652

> 7.8 HIGH

## Beschreibung

A heap-based buffer overflow vulnerability exists in the Dia diagram editor WPG file format importer.

In plug-ins/wpg/wpg-import.c, the WPG import renderer allocates a fixed palette with:

    ren->pPal = g_new0(WPGColorRGB, 256);

When handling a WPG_COLORMAP record, the parser reads a start index (i16) and number of colors (iNum16) from the file and reads palette data with:

    bRet &= (iNum16 == (int)fread(&ren->pPal[i16], sizeof(WPGColorRGB), iNum16, f));

The only bounds-related check is `if (i16 >= 0 && i16

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2026-77652>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2520884>
- <https://gitlab.gnome.org/GNOME/dia/-/blob/master/plug-ins/wpg/wpg-import.c>
- <https://gitlab.gnome.org/GNOME/dia/-/issues/580>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-77652) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_