CVE-2011-1475: n/a vulnerability

CVE-2011-1475: The HTTP BIO connector in Apache Tomcat 7.0.x before 7.0.12 does not properly handle HTTP pipelining, which...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 22:28 UTC (UTC+00:00)

Security readout for executives and security teams

A flaw in Apache Tomcat 7.0.x before 7.0.12 could mix up HTTP responses when HTTP pipelining is used. In rare conditions, one remote client could see data meant for another user. The business risk is unintended disclosure of application data, especially on legacy internet-facing Tomcat services. Exposure is most likely in legacy Apache Tomcat 7.0.x deployments earlier than 7.0.12 using the HTTP BIO connector where HTTP pipelining can occur. Modern Tomcat versions and non-affected connector paths are not established as exposed by the provided sources. Treat as a targeted legacy remediation item. It is not presented as actively exploited, but affected systems can leak user data across sessions. Prioritize exposed or regulated-data applications, then remove remaining obsolete Tomcat 7 instances from the environment. Mitigation focus: Upgrade Apache Tomcat 7.0.x systems to 7.0.12 or later.; Review Apache Tomcat security guidance for connector-specific recommendations.; Prioritize internet-facing or multi-user Tomcat services first..

Prepared: Jun 24, 2026, 13:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 8, 2011, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:12374CVE reference · vdb-entry, signature
https://issues.apache.org/bugzilla/show_bug.cgi?id=50957CVE reference · x_refsource_MISC
tomcat-httpbio-info-disclosure(66676)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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