CVE-2026-76956

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.

Database specific

{
    "cna_assigner": "mitre",
    "cwe_ids": [
        "CWE-394"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76956.json"
}

References

Affected packages

Git / github.com/libexpat/libexpat

Affected ranges

Type

GIT

Repo

https://github.com/libexpat/libexpat

Events

Introduced

c61098da494eea1cbd091118118dcee417faacea

Fixed

12cf0b1f25f026a022fe728ad8f7e3d017285b80

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "2.8.2"
                },
                {
                    "fixed": "2.8.4"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "cpe": "cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "2.8.2"
                },
                {
                    "fixed": "2.8.4"
                }
            ],
            "source": "CPE_RANGE"
        }
    ]
}

Affected versions

Other

R_2_8_2

R_2_8_3

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-76956.json"