How severe is CVE-2008-4226?

CVE-2008-4226 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2008-4226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4226?

CVE-2008-4226 affects Xmlsoft Libxml. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-4226?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2008-4226 published?

CVE-2008-4226 was published on 2008-11-25 and last updated on 2026-06-16.

CVE-2008-4226

CVE-2008-4226 is a critical-severity vulnerability in Xmlsoft Libxml with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Xmlsoft Libxml
Published: 2008-11-25
Last modified: 2026-06-16

Description

Integer overflow in the xmlSAX2Characters function in libxml2 2.7.2 allows context-dependent attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a large XML document.

Frequently asked questions

What is CVE-2008-4226?: Integer overflow in the xmlSAX2Characters function in libxml2 2.7.2 allows context-dependent attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a large XML document.
How severe is CVE-2008-4226?: CVE-2008-4226 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2008-4226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4226?: CVE-2008-4226 affects Xmlsoft Libxml. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-4226?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2008-4226 published?: CVE-2008-4226 was published on 2008-11-25 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:xmlsoft:libxml:2.7.2:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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