CVE-2026-6653

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Source
https://cve.org/CVERecord?id=CVE-2026-6653
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-6653.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-6653
Downstream
BELL (1)
DEBIAN (1)
ECHO (1)
JLSEC (1)
RHSA (1)
RLSA (1)
ROOT (3)
UBUNTU (1)
Related
Published
2026-06-22T12:40:31Z
Modified
2026-08-31T14:56:40Z
Severity
  • 7.0 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling
Details

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.

Database specific 
{
    "cna_assigner":  "canonical",
    "cwe_ids":  [
        "CWE-416",
        "CWE-611"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6653.json"
}
References

Affected packages

Git / github.com/gnome/libxml2

Affected ranges

Type
GIT
Repo
https://github.com/gnome/libxml2
Events
Introduced
e1bcffea180d6cc0651757bb64284a763e0e2239
Last Affected
f296934ade688baab79caf1c62a82149ad78accf
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "2.9.11"
        },
        {
            "last_affected":  "2.11.0"
        }
    ],
    "source":  "CPE_RANGE"
}
Type
GIT
Repo
https://gitlab.gnome.org/gnome/libxml2
Events
Introduced
e1bcffea180d6cc0651757bb64284a763e0e2239
Fixed
f296934ade688baab79caf1c62a82149ad78accf
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "2.9.11"
        },
        {
            "fixed":  "2.11.0"
        },
        {
            "last_affected":  "2.11.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

v2.*
v2.10.0
v2.11.0
v2.9.11
v2.9.12
v2.9.13

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-6653.json"