No exploitation reportedFix available

CVE-2009-0783

No exploitation reported by the sources we read.

Published2009-06-05
WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18 permits web applications to replace an XML parser used for other web applications, which allows local users to read or modify the (1) web.xml, (2) context.xml, or (3) tld files of arbitrary web applications via a crafted application that is loaded earlier than the target application.

Timeline

dates in UTC

2009-06-0516:00CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2009-0783?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2009-0783?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apache Tomcat

Branch	Affected	Fixed in	Source
4.1	≥ 4.1.0, ≤ 4.1.39	no fix published	NVD
5.5	≥ 5.5.0, ≤ 5.5.27	no fix published	NVD
6.0	≥ 6.0.0, ≤ 6.0.18	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

secunia.comVendor Advisory
secunia.comVendor Advisory
secunia.comVendor Advisory
secunia.comVendor Advisory
svn.apache.orgPatch
svn.apache.orgPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.04.2read 2026-10-23
NVDCVSS 2.04.6read 2026-10-23
NVDweakness (CWE)CWE-200read 2026-10-23
FIRST EPSSEPSS score0.8 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Published: 2009-06-05
Last Modified: 2026-06-16
NVD status: Modified

Frequently asked questions

What is CVE-2009-0783?

Is CVE-2009-0783 actively exploited?

Active exploitation of CVE-2009-0783 has not been confirmed. Its EPSS score was 0.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2009-0783?

CVE-2009-0783 has a CVSS v3 base score of 4.2 (MEDIUM severity), with vector string CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.

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