01 Record

CVE-2020-11996

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

UnratedPUBLISHEDCNA: apache

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 26.70% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 97.8% of scored records. A rank, not a probability.
NVD base score: 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2020-06-26 16:27Z6 YR AGO

Last updated

2024-08-04 11:48Z2 YR AGO

Reserved

2020-04-21

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

4bab06ca14fec143c8da608c27d1f2db6080f6373046df188f5fea4b98948469

05 Affected products

VendorProductVersionsPlatforms

ApacheApache Tomcat10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35, 8.5.0 to 8.5.55—

06 References

lists.apache.orghttps://lists.apache.org/thread.html/r5541ef6b6b68b49f76fc4c45695940116da2bcbe0312ef204a00a2e0%40%3Cannounce.tomcat.apache.org%3Ex_refsource_CONFIRM
lists.apache.org[ofbiz-notifications] 20200628 [jira] [Updated] (OFBIZ-11847) CLONE - Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/ra7092f7492569b39b04ec0decf52628ba86c51f15efb38f5853e2760%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200628 [jira] [Closed] (OFBIZ-11847) CLONE - Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/rb4ee49ecc4c59620ffd5e66e84a17e526c2c3cfa95d0cd682d90d338%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200628 [jira] [Created] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/rb820f1a2a02bf07414be12c653c2ab5321fd87b9bf6c5e635c53ff4b%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200628 [jira] [Created] (OFBIZ-11847) CLONE - Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/r8f7484589454638af527182ae55ef5b628ba00c05c5b11887c922fb1%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-commits] 20200628 [ofbiz-framework] branch release18.12 updated: Fixed: Upgrades Tomcat to 9.0.36 due to CVE-2020-11996 (OFBIZ-11848)https://lists.apache.org/thread.html/r74f5a8204efe574cbfcd95b2a16236fe95beb45c4d9fee3dc789dca9%40%3Ccommits.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200628 [jira] [Closed] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/rea65d6ef2e45dd1c45faae83922042732866c7b88fa109b76c83db52%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200628 [jira] [Commented] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/rc80b96b4b96618b2b7461cb90664a428cfd6605eea9f74e51b792542%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-commits] 20200628 [ofbiz-framework] branch release17.12 updated: Fixed: Upgrades Tomcat to 9.0.36 due to CVE-2020-11996 (OFBIZ-11848)https://lists.apache.org/thread.html/r93ca628ef3a4530dfe5ac49fddc795f0920a4b2a408b57a30926a42b%40%3Ccommits.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-commits] 20200628 [ofbiz-framework] branch trunk updated: Fixed: Upgrades Tomcat to 9.0.36 due to CVE-2020-11996 (OFBIZ-11848)https://lists.apache.org/thread.html/r8f3d416c193bc9384a8a7dd368623d441f5fcaff1057115008100561%40%3Ccommits.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200701 [jira] [Reopened] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/r9ad911fe49450ed9405827af0e7a74104041081ff91864b1f2546bbd%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200703 [jira] [Comment Edited] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/ref0339792ac6dac1dba83c071a727ad72380899bde60f6aaad4031b9%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200703 [jira] [Closed] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/r6c29801370a36c1a5159679269777ad0c73276d3015b8bbefea66e5c%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.apache.org[ofbiz-notifications] 20200703 [jira] [Commented] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/r3ea96d8f36dd404acce83df8aeb22a9e807d6c13ca9c5dec72f872cd%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST
lists.debian.org[debian-lts-announce] 20200712 [SECURITY] [DLA 2279-1] tomcat8 security updatehttps://lists.debian.org/debian-lts-announce/2020/07/msg00010.htmlmailing-listx_refsource_MLIST
www.debian.orgDSA-4727https://www.debian.org/security/2020/dsa-4727vendor-advisoryx_refsource_DEBIAN
lists.opensuse.orgopenSUSE-SU-2020:1051http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00064.htmlvendor-advisoryx_refsource_SUSE
lists.opensuse.orgopenSUSE-SU-2020:1063http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00072.htmlvendor-advisoryx_refsource_SUSE
lists.apache.org[tomcat-users] 20201008 Is Tomcat7 supports HTTP2https://lists.apache.org/thread.html/r2529016c311ce9485e6f173446d469600fdfbb94dccadfcd9dfdac79%40%3Cusers.tomcat.apache.org%3Emailing-listx_refsource_MLIST
www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2020.htmlx_refsource_MISC
security.netapp.comhttps://security.netapp.com/advisory/ntap-20200709-0002/x_refsource_CONFIRM
usn.ubuntu.comUSN-4596-1https://usn.ubuntu.com/4596-1/vendor-advisoryx_refsource_UBUNTU
www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2021.htmlx_refsource_MISC
lists.apache.org[ofbiz-notifications] 20210301 [jira] [Updated] (OFBIZ-11848) Upgrade Tomcat from 9.0.34 to 9.0.36 (CVE-2020-11996)https://lists.apache.org/thread.html/r5a4f80a6acc6607d61dae424b643b594c6188dd4e1eff04705c10db2%40%3Cnotifications.ofbiz.apache.org%3Emailing-listx_refsource_MLIST

01 Record index

CVE-2020-11996

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2020-11996

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References