High severity7.5NVD Advisory· Published Mar 1, 2021· Updated Jun 17, 2026

CVE-2021-25122

Description

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
org.apache.tomcat.embed:tomcat-embed-coreMaven	>= 10.0.0-M1, < 10.0.2	10.0.2
org.apache.tomcat.embed:tomcat-embed-coreMaven	>= 9.0.0-M1, < 9.0.43	9.0.43
org.apache.tomcat.embed:tomcat-embed-coreMaven	>= 8.5.0, < 8.5.63	8.5.63
org.apache.tomcat:tomcat-coyoteMaven	>= 10.0.0-M1, < 10.0.2	10.0.2

Affected products

Apache Software Foundation/Apache Tomcatv5
Range: Apache Tomcat 10
ghsa-coords28 versions
pkg:maven/org.apache.tomcat.embed/tomcat-embed-core pkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2015.2 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/tomcat&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/tomcat&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/tomcat&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/opensuse/tomcat10&distro=openSUSE%20Tumbleweed pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP2 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:apk/chainguard/spark-3.5.0-compat pkg:bitnami/tomcat pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/tomcat&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/opensuse/tomcat&distro=openSUSE%20Tumbleweed
>= 10.0.0, < 10.0.2+ 27 more
- (no CPE)range: >= 10.0.0, < 10.0.2
- (no CPE)range: < 9.0.36-lp152.2.22.1
- (no CPE)range: < 9.0.36-3.79.1
- (no CPE)range: < 9.0.36-3.79.1
- (no CPE)range: < 9.0.36-3.64.1
- (no CPE)range: < 9.0.36-3.64.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 10.1.14-1.1
- (no CPE)range: < 9.0.36-3.24.1
- (no CPE)range: < 9.0.36-3.64.1
- (no CPE)range: < 9.0.36-3.79.1
- (no CPE)range: < 9.0.36-3.79.1
- (no CPE)range: < 3.5.0-r2
- (no CPE)range: >= 8.5.0, < 8.5.62
- (no CPE)range: < 9.0.115-3.160.1
- (no CPE)range: < 9.0.115-3.160.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-3.64.1
- (no CPE)range: < 9.0.36-3.64.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-4.58.1
- (no CPE)range: < 9.0.36-3.64.1
- (no CPE)range: < 9.0.36-8.4
Apache/Tomcat35 versions
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*+ 34 more
- cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*range: >=8.5.0,<=8.5.61
- cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone3:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone4:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:-:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone1:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone10:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone2:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone3:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone4:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone5:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone6:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone7:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone8:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:10.0.0:milestone9:*:*:*:*:*:*
Debian/linux2 versions
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Oracle Corporation/Agile Plm2 versions
cpe:2.3:a:oracle:agile_plm:9.3.3:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:agile_plm:9.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:agile_plm:9.3.6:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Policy
cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Security Edge Protection Proxy
cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:1.6.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Instant Messaging Server
cpe:2.3:a:oracle:communications_instant_messaging_server:10.0.1.5.0:*:*:*:*:*:*:*
Oracle Corporation/Database 9i3 versions
cpe:2.3:a:oracle:database:12.2.0.1:*:*:*:enterprise:*:*:*+ 2 more
- cpe:2.3:a:oracle:database:12.2.0.1:*:*:*:enterprise:*:*:*
- cpe:2.3:a:oracle:database:19c:*:*:*:enterprise:*:*:*
- cpe:2.3:a:oracle:database:21c:*:*:*:enterprise:*:*:*
Oracle Corporation/Graph Server And Client2 versions
cpe:2.3:a:oracle:graph_server_and_client:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:graph_server_and_client:*:*:*:*:*:*:*:*range: <21.3.0
- cpe:2.3:a:oracle:graph_server_and_client:21.3.0:*:*:*:*:*:*:*
Oracle Corporation/Instantis Enterprisetrack3 versions
cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
Oracle Corporation/Managed File Transfer2 versions
cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:managed_file_transfer:12.2.1.4.0:*:*:*:*:*:*:*
Oracle Corporation/Mysql Enterprise Monitor
cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:*
Range: <=8.0.23
Oracle Corporation/Siebel UI Framework
cpe:2.3:a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:*
Range: <=21.9

Patches

Vulnerability mechanics

References

www.oracle.com//security-alerts/cpujul2021.htmlnvdPatchThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpujan2022.htmlnvdPatchThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpuoct2021.htmlnvdPatchThird Party AdvisoryWEB
www.openwall.com/lists/oss-security/2021/03/01/1nvdMailing ListThird Party AdvisoryWEB
github.com/advisories/GHSA-j39c-c8hj-x4j3ghsaADVISORY
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.tomcat.apache.org%3EnvdMailing ListVendor AdvisoryWEB
lists.debian.org/debian-lts-announce/2021/03/msg00018.htmlnvdMailing ListThird Party AdvisoryWEB
nvd.nist.gov/vuln/detail/CVE-2021-25122ghsaADVISORY
security.gentoo.org/glsa/202208-34nvdThird Party AdvisoryWEB
security.netapp.com/advisory/ntap-20210409-0002/nvdThird Party Advisory
www.debian.org/security/2021/dsa-4891nvdThird Party AdvisoryWEB
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cannounce.apache.org%3EghsaWEB
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cannounce.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cdev.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7@%3Cusers.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/rcd90bf36b1877e1310b87ecd14ed7bbb15da52b297efd9f0e7253a3b@%3Cusers.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/rd0463f9a5cbc02a485404c4b990f0da452e5ac5c237808edba11c947@%3Cusers.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9@%3Cdev.tomcat.apache.org%3EghsaWEB
security.netapp.com/advisory/ntap-20210409-0002ghsaWEB
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.apache.org%3Envd
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cdev.tomcat.apache.org%3Envd
lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cusers.tomcat.apache.org%3Envd
lists.apache.org/thread.html/rcd90bf36b1877e1310b87ecd14ed7bbb15da52b297efd9f0e7253a3b%40%3Cusers.tomcat.apache.org%3Envd
lists.apache.org/thread.html/rd0463f9a5cbc02a485404c4b990f0da452e5ac5c237808edba11c947%40%3Cusers.tomcat.apache.org%3Envd
lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9%40%3Cdev.tomcat.apache.org%3Envd

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cvss	0.488
epss	0.014
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000