How severe is CVE-2005-4836?

CVE-2005-4836 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2005-4836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-4836?

CVE-2005-4836 primarily affects Apache Tomcat. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-4836?

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

When was CVE-2005-4836 published?

CVE-2005-4836 was published on 2005-12-31 and last updated on 2026-06-16.

CVE-2005-4836

CVE-2005-4836 is a high-severity vulnerability in Apache Tomcat with a CVSS 2.0 base score of 7.8. 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-200.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apache Tomcat
Published: 2005-12-31
Last modified: 2026-06-16

Description

The HTTP/1.1 connector in Apache Tomcat 4.1.15 through 4.1.40 does not reject NULL bytes in a URL when allowLinking is configured, which allows remote attackers to read JSP source files and obtain sensitive information.

Frequently asked questions

What is CVE-2005-4836?: The HTTP/1.1 connector in Apache Tomcat 4.1.15 through 4.1.40 does not reject NULL bytes in a URL when allowLinking is configured, which allows remote attackers to read JSP source files and obtain sensitive information.
How severe is CVE-2005-4836?: CVE-2005-4836 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2005-4836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-4836?: CVE-2005-4836 primarily affects Apache Tomcat. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-4836?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-4836 published?: CVE-2005-4836 was published on 2005-12-31 and last updated on 2026-06-16.

References

Affected products (26)

cpe:2.3:a:apache:tomcat:4.1.15:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.16:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.17:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.18:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.19:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.20:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.21:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.22:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.23:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.24:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.25:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.26:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.27:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.28:alpha:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.29:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.29:alpha:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.30:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.31:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.32:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.33:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.34:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.35:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.36:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.37:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.39:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:4.1.40:*:*:*:*:*:*:*

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