CVE•Published 2026-08-20•Modified 2026-09-08•0 articles on news•4 live references•NVD data

CVE-2026-76956Libexpat_project · Libexpat

Vulnerability data via NVD (ingested)

CVSS v3.1

5.9

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 80% of all CVEs

Weaknesses (CWE)

CWE-394Unexpected Status Code or Return Value

Description

In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content.

Timeline

Published 2026-08-20

Modified 2026-09-08

External references

NVD MITRE Exploit-DB 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-2026-76956

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Libexpat Project Libexpat"

All exposed Libexpat Project Libexpat instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Libexpat"

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

More intel sources (5)

Shodan report

vuln:CVE-2026-76956