# X.org Xorg-Server vulnerabilities

Source: https://junglewise.ai/threats/technologies/xorg-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/xorg-server.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in X.org Xorg-Server: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-56000, was published on 8 July 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 5 (0 critical, 0 exploited in the wild)

## About X.org Xorg-Server

X.Org Server is the free and open-source implementation of the X Window System display server.

## Latest X.org Xorg-Server vulnerabilities

- [CVE-2026-56000: X.Org xorg-server and xwayland heap use-after-free in GLX CommonMakeCurrent](https://junglewise.ai/threats/cve-2026-56000-x-org-xorg-server-and-xwayland-heap-use-after-free-in-glx) (info, CVSS 9, published 8 Jul 2026)
- [CVE-2026-55999: X.Org xorg-server and xwayland heap buffer overflow in glamor font atlas](https://junglewise.ai/threats/cve-2026-55999-x-org-xorg-server-and-xwayland-heap-buffer-overflow-in-glamor) (high, CVSS 8.5, published 8 Jul 2026)
- [CVE-2026-50263: X.Org X server and Xwayland use-after-free in CreateSaverWindow](https://junglewise.ai/threats/cve-2026-50263-x-org-x-server-and-xwayland-use-after-free-in-createsaverwindow) (medium, CVSS 5.5, published 5 Jun 2026)
- [CVE-2025-62230: X.Org X server use-after-free in Xkb client resource removal](https://junglewise.ai/threats/cve-2025-62230-x-org-x-server-use-after-free-in-xkb-client-resource-removal) (high, CVSS 7.3, published 30 Oct 2025)
- [CVE-2025-62231: X.Org X server integer overflow in XkbSetCompatMap](https://junglewise.ai/threats/cve-2025-62231-x-org-x-server-integer-overflow-in-xkbsetcompatmap) (high, CVSS 7.3, published 30 Oct 2025)

## Most severe X.org Xorg-Server vulnerabilities

- [CVE-2026-55999: X.Org xorg-server and xwayland heap buffer overflow in glamor font atlas](https://junglewise.ai/threats/cve-2026-55999-x-org-xorg-server-and-xwayland-heap-buffer-overflow-in-glamor) (high, CVSS 8.5, published 8 Jul 2026)
- [CVE-2025-62231: X.Org X server integer overflow in XkbSetCompatMap](https://junglewise.ai/threats/cve-2025-62231-x-org-x-server-integer-overflow-in-xkbsetcompatmap) (high, CVSS 7.3, published 30 Oct 2025)
- [CVE-2025-62230: X.Org X server use-after-free in Xkb client resource removal](https://junglewise.ai/threats/cve-2025-62230-x-org-x-server-use-after-free-in-xkb-client-resource-removal) (high, CVSS 7.3, published 30 Oct 2025)
- [CVE-2026-50263: X.Org X server and Xwayland use-after-free in CreateSaverWindow](https://junglewise.ai/threats/cve-2026-50263-x-org-x-server-and-xwayland-use-after-free-in-createsaverwindow) (medium, CVSS 5.5, published 5 Jun 2026)
- [CVE-2026-56000: X.Org xorg-server and xwayland heap use-after-free in GLX CommonMakeCurrent](https://junglewise.ai/threats/cve-2026-56000-x-org-xorg-server-and-xwayland-heap-use-after-free-in-glx) (info, CVSS 9, published 8 Jul 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other X.org technologies

- [X.org X Server](https://junglewise.ai/threats/technologies/x-org-x-server): 11 vulnerabilities
- [X.org XWayland](https://junglewise.ai/threats/technologies/x-org-xwayland): 10 vulnerabilities
- [X.org libXi](https://junglewise.ai/threats/technologies/libxi): 7 vulnerabilities
- [X.org libXfont2](https://junglewise.ai/threats/technologies/libxfont2): 5 vulnerabilities
- [X.org libX11](https://junglewise.ai/threats/technologies/libx11): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "X.org Xorg-Server vulnerabilities", https://junglewise.ai/threats/technologies/xorg-server, 9 November 2026.