CVE-2011-1475

mediumpriority · track · 33EPSS 0.087 · 95 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

8.69% (95th) EPSS

CVSS 5 · medium

Is it mine?

14 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

The HTTP BIO connector in Apache Tomcat 7.0.x before 7.0.12 does not properly handle HTTP pipelining, which allows remote attackers to read responses intended for other clients in opportunistic circumstances by examining the application data in HTTP packets, related to "a mix-up of responses for requests from different users."

cvss

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

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.5mediumAV:N/AC:L/Au:N/C:P/I:N/A:N/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20US

exploits (1)

Public proof-of-concept and weaponised exploit code.

samaujs/CVE-2011-1475Check with Maven on CVE-2011-1475PoC · poc_in_github

affected products (14)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
apache tomcat= 7.0.0nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.1nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.10nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.11nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.2nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.3nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.4nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.5nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.6nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.7nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.8nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat= 7.0.9nvdUScpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
Maven org.apache.tomcat:tomcat7.0.0 → 7.0.12osvUSpkg:maven/org.apache.tomcat/tomcat

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-h6c8-rg87-f3pcApache Tomcat HTTP BIO Connector Error Discloses Information From Different Requests to Remote Users2022-05-17ghsa · osvUS
The HTTP BIO connector in Apache Tomcat 7.0.x before 7.0.12 does not properly handle HTTP pipelining, which allows remote attackers to read responses intended for other clients in opportunistic circumstances by examining the application data in HTTP packets, related to "a mix-up of responses for requests from different users."

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 2011-04-08modified 2026-06-16

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+25188 more

references (32)

External citations — patches, advisories, analysis.

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