CVE•Published 2026-05-05•Modified 2026-06-08•0 articles on news•6 live references•NVD data

CVE-2026-34002X.org · X_server

Vulnerability data via NVD (ingested)

CVSS v3.1

6.1

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 92% of all CVEs

Weaknesses (CWE)

CWE-805Buffer Access with Incorrect Length Value

Description

A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.

Timeline

Published 2026-05-05

Modified 2026-06-08

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-34002

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"X.org X Server"

All exposed X.org X Server instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"X Server"

HTTP body or banner mentions "X Server" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-34002