# X.Org Foundation Xwayland vulnerabilities

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

Junglewise Threat Intelligence has tracked 6 vulnerabilities in X.Org Foundation Xwayland: 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-2026-50261, was published on 5 June 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 6 (0 critical, 0 exploited in the wild)

## About X.Org Foundation Xwayland

Xwayland is an X Server that runs as a Wayland client, enabling the display of native X11 applications in a Wayland compositor environment.

## Latest X.Org Foundation Xwayland vulnerabilities

- [CVE-2026-50261: X.Org X server use-after-free in SyncChangeCounter](https://junglewise.ai/threats/cve-2026-50261-x-org-x-server-use-after-free-in-syncchangecounter) (high, CVSS 7.8, published 5 Jun 2026)
- [CVE-2026-50260: X.Org X server and Xwayland use-after-free in FreeCounter](https://junglewise.ai/threats/cve-2026-50260-x-org-x-server-and-xwayland-use-after-free-in-freecounter) (high, CVSS 7.8, published 5 Jun 2026)
- [CVE-2026-50259: X.Org X server stack buffer overflow in XKB SetMap request](https://junglewise.ai/threats/cve-2026-50259-x-org-x-server-stack-buffer-overflow-in-xkb-setmap-request) (high, CVSS 7.8, published 5 Jun 2026)
- [CVE-2026-34003: X.Org X server out-of-bounds memory access in XKB request validation](https://junglewise.ai/threats/cve-2026-34003-x-org-x-server-out-of-bounds-memory-access-in-xkb-request) (high, CVSS 7.8, published 23 Apr 2026)
- [CVE-2026-34001: X.Org X server use-after-free in miSyncTriggerFence](https://junglewise.ai/threats/cve-2026-34001-x-org-x-server-use-after-free-in-misynctriggerfence) (high, CVSS 7.8, published 23 Apr 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)

## Most severe X.Org Foundation Xwayland vulnerabilities

- [CVE-2026-34003: X.Org X server out-of-bounds memory access in XKB request validation](https://junglewise.ai/threats/cve-2026-34003-x-org-x-server-out-of-bounds-memory-access-in-xkb-request) (high, CVSS 7.8, published 23 Apr 2026)
- [CVE-2026-34001: X.Org X server use-after-free in miSyncTriggerFence](https://junglewise.ai/threats/cve-2026-34001-x-org-x-server-use-after-free-in-misynctriggerfence) (high, CVSS 7.8, published 23 Apr 2026)
- [CVE-2026-50261: X.Org X server use-after-free in SyncChangeCounter](https://junglewise.ai/threats/cve-2026-50261-x-org-x-server-use-after-free-in-syncchangecounter) (high, CVSS 7.8, published 5 Jun 2026)
- [CVE-2026-50260: X.Org X server and Xwayland use-after-free in FreeCounter](https://junglewise.ai/threats/cve-2026-50260-x-org-x-server-and-xwayland-use-after-free-in-freecounter) (high, CVSS 7.8, published 5 Jun 2026)
- [CVE-2026-50259: X.Org X server stack buffer overflow in XKB SetMap request](https://junglewise.ai/threats/cve-2026-50259-x-org-x-server-stack-buffer-overflow-in-xkb-setmap-request) (high, CVSS 7.8, 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)

## 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 Foundation technologies

- [X.Org Foundation X.Org Server](https://junglewise.ai/threats/technologies/x-server): 10 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 Foundation Xwayland vulnerabilities", https://junglewise.ai/threats/technologies/xwayland, 9 November 2026.