How severe is CVE-2009-3476?

CVE-2009-3476 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-3476 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3476?

CVE-2009-3476 primarily affects Internet2 Shibboleth-sp. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3476?

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-2009-3476 published?

CVE-2009-3476 was published on 2009-09-29 and last updated on 2026-06-16.

CVE-2009-3476

CVE-2009-3476 is a critical-severity vulnerability in Internet2 Shibboleth-sp with a CVSS 2.0 base score of 9.3. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Internet2 Shibboleth-sp
Published: 2009-09-29
Last modified: 2026-06-16

Description

Buffer overflow in OpenSAML before 1.1.3 as used in Internet2 Shibboleth Service Provider software 1.3.x before 1.3.4, and XMLTooling before 1.2.2 as used in Internet2 Shibboleth Service Provider software 2.x before 2.2.1, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a malformed encoded URL.

Frequently asked questions

What is CVE-2009-3476?: Buffer overflow in OpenSAML before 1.1.3 as used in Internet2 Shibboleth Service Provider software 1.3.x before 1.3.4, and XMLTooling before 1.2.2 as used in Internet2 Shibboleth Service Provider software 2.x before 2.2.1, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a malformed encoded URL.
How severe is CVE-2009-3476?: CVE-2009-3476 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-3476 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3476?: CVE-2009-3476 primarily affects Internet2 Shibboleth-sp. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3476?: 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-2009-3476 published?: CVE-2009-3476 was published on 2009-09-29 and last updated on 2026-06-16.

References

Affected products (14)

cpe:2.3:a:internet2:shibboleth-sp:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:1.3.3:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:1.3f:*:*:*:*:*:*:*
cpe:2.3:a:internet2:opensaml:1.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:opensaml:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:xmltooling:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:xmltooling:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:internet2:xmltooling:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:xmltooling:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:internet2:xmltooling:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:2.0:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:2.1:*:*:*:*:*:*:*
cpe:2.3:a:internet2:shibboleth-sp:2.2:*:*:*:*:*:*:*

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