CVE-2013-4322

mediumpriority · track · 30EPSS 0.091 · 95 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

9.10% (95th) EPSS

CVSS 4.3 · medium

Is it mine?

178 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

Apache Tomcat before 6.0.39, 7.x before 7.0.50, and 8.x before 8.0.0-RC10 processes chunked transfer coding without properly handling (1) a large total amount of chunked data or (2) whitespace characters in an HTTP header value within a trailer field, which allows remote attackers to cause a denial of service by streaming data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-3544.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.9–4.3

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.03.9lowAV:N/AC:M/Au:N/C:N/I:N/A:P/E:POCsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-400US

exploits (1)

Public proof-of-concept and weaponised exploit code.

LiviuPtr/CVE-2013-4322_PoCA simple python script PoC demonstrating the slow POST chunked transmission vulnerability.PoC · poc_in_github

affected products (178)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
apache tomcat≤ 6.0.37nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 1.1.3nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.0nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.1nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.1.1nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.2nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.2.1nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.2.2nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.2.3nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.2.4nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.3nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.3.1nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.3.1anvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 3.3.2nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 4nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 4.0.0nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 4.0.1nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 4.0.2nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 4.0.3nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*

showing 20 of 178

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-wq2p-q66w-q8gpApache Tomcat Denial of Service vulnerability2022-05-14ghsa · osvUS
Apache Tomcat before 6.0.39, 7.x before 7.0.50, and 8.x before 8.0.0-RC10 processes chunked transfer coding without properly handling (1) a large total amount of chunked data or (2) whitespace characters in an HTTP header value within a trailer field, which allows remote attackers to cause a denial of service by streaming data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-3544.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2014-02-26modified 2026-10-09

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+25188 more

references (121)

External citations — patches, advisories, analysis.

scry

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