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Back to active CVEs
High · CVSS 7.5CVE-2020-11996GHSA-53HP-JPWQ-2JGQ

CVE Program ContainerCVE-2020-11996

Answer in brief

CVE-2020-11996 records a High severity (CVSS 7.5) vulnerability in CVE Program Container. The current sources do not mark it as known exploited. The current feed maps Apache/Apache Tomcat (generic), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 26, 2020Updated Oct 8, 2026Source checked Oct 8, 2026First seen by HOL Jun 11, 2026Material review Oct 8, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
13 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache/Apache Tomcat (generic), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Apache/Apache Tomcatgeneric10.0.0-M1 to 10.0.0-M5 || 9.0.0.M1 to 9.0.35 || 8.5.0 to 8.5.55Not reported
org.apache.tomcat.embed:tomcat-embed-coremaven>=10.0.0-M1,<=10.0.0-M410.0.0-M5
org.apache.tomcat.embed:tomcat-embed-coremaven>=9.0.0.M1,<9.0.359.0.35
org.apache.tomcat.embed:tomcat-embed-coremaven>=8.5.0,<8.5.558.5.55
org.apache.tomcat.embed:tomcat-embed-coremaven>=10.0.0-M1 <10.0.0-M510.0.0-M5
org.apache.tomcat.embed:tomcat-embed-coremaven>=9.0.0.M1 <9.0.359.0.35
org.apache.tomcat.embed:tomcat-embed-coremaven>=8.5.0 <8.5.558.5.55
org.apache.tomcat:tomcatmaven>=10.0.0-M1,<=10.0.0-M410.0.0-M5
org.apache.tomcat:tomcatmaven>=9.0.0.M1,<9.0.359.0.35
org.apache.tomcat:tomcatmaven>=8.5.0,<8.5.558.5.55
org.apache.tomcat:tomcatmaven>=10.0.0-M1 <10.0.0-M510.0.0-M5
org.apache.tomcat:tomcatmaven>=9.0.0.M1 <9.0.359.0.35
org.apache.tomcat:tomcatmaven>=8.5.0 <8.5.558.5.55

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Apache/Apache Tomcat, org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat.embed:tomcat-embed-core.
  2. 2Review the reported fix. Update org.apache.tomcat.embed:tomcat-embed-core to 10.0.0-M5; org.apache.tomcat.embed:tomcat-embed-core to 9.0.35; org.apache.tomcat.embed:tomcat-embed-core to 8.5.55; org.apache.tomcat.embed:tomcat-embed-core to 10.0.0-M5; org.apache.tomcat.embed:tomcat-embed-core to 9.0.35; org.apache.tomcat.embed:tomcat-embed-core to 8.5.55; org.apache.tomcat:tomcat to 10.0.0-M5; org.apache.tomcat:tomcat to 9.0.35; org.apache.tomcat:tomcat to 8.5.55; org.apache.tomcat:tomcat to 10.0.0-M5; org.apache.tomcat:tomcat to 9.0.35; org.apache.tomcat:tomcat to 8.5.55 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jun 26, 2020

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 11, 2026

Sources and claim methodology

  • Source referencelists.opensuse.org
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  • Source referencelists.debian.org
  • Source referencesecurity.netapp.com
  • Source referenceusn.ubuntu.com
  • Source referencedebian.org
  • Source referenceoracle.com
  • Source referenceoracle.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencelists.apache.org
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  • NVD vulnerability recordnvd.nist.gov
  • Source referencesecurity.netapp.com
  • Source referencetomcat.apache.org
  • Source referencetomcat.apache.org
  • Source referencetomcat.apache.org
  • Source referenceusn.ubuntu.com
  • GitHub security advisorygithub.com
Upstream source description

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

Quoted source text, attributed separately from HOL analysis.

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  • Unauthenticated JSON API Authorization Bypass Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
  • Unauthenticated RTSP Tunnel Denial-of-Service Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
  • Predictable Media Stream Pre-Shared Key Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
  • Eog: eog: arbitrary code execution via heap buffer overflow in png metadata readerSame generic ecosystem
  • fast-jwt: Incomplete patch of CVE-2026-34950: Non-whitespace key-prefix re-enables RSA→HS256 algorithm confusionSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 8, 2026
References
50 linked sources
Open source record