OCTOBER 10, 2026
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Case File

CVE-2026-88806

HIGH · CVSS 7.5 EPSS 0.20% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-21 · Last synced 2026-10-10

CyberRota Analysis

AI-Generated

A buffer overflow vulnerability in libX11 versions prior to 1.8.14 allows a malicious X server to exploit the handling of XkbGetMap, potentially leading to arbitrary code execution. This high-severity flaw poses significant risks to systems utilizing affected versions of libX11, particularly in environments where untrusted X servers may be present. Organizations using libX11 should prioritize patching to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-88806
Severity
HIGH
CVSS
7.5
EPSS
0.20%

Original NVD Description

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.