CVE-2026-43513

EUVD-2026-29517
Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.
Older unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 38.09%
Affected Products (NVD)
VendorProductVersion
apachetomcat
7.0.0 ≤
𝑥
≤ 7.0.109
apachetomcat
8.5.0 ≤
𝑥
≤ 8.5.100
apachetomcat
9.0.0 ≤
𝑥
< 9.0.118
apachetomcat
10.1.0 ≤
𝑥
< 10.1.55
apachetomcat
11.0.0 ≤
𝑥
< 11.0.22
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
tomcat10
bookworm
10.1.55-1~deb12u1
fixed
bookworm (security)
10.1.55-1~deb12u1
fixed
forky
10.1.55-1
fixed
sid
10.1.55-1
fixed
trixie
10.1.55-1~deb13u1
fixed
trixie (security)
10.1.55-1~deb13u1
fixed
tomcat11
forky
11.0.24-1
fixed
sid
11.0.24-1
fixed
trixie
11.0.22-1~deb13u1
fixed
trixie (security)
11.0.22-1~deb13u1
fixed
tomcat9
bookworm
9.0.70-2
fixed
bullseye
vulnerable
bullseye (security)
9.0.118-0+deb11u1
fixed
forky
9.0.118-1
fixed
sid
9.0.118-1
fixed
trixie
9.0.95-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
tomcat9
bionic
Fixed 9.0.16-3ubuntu0.18.04.2+esm8
released
focal
Fixed 9.0.31-1ubuntu0.9+esm3
released
jammy
Fixed 9.0.58-1ubuntu0.2+esm4
released
noble
Fixed 9.0.70-2ubuntu0.1+esm3
released
questing
Fixed 9.0.95-1ubuntu1.1
released
resolute
Fixed 9.0.115-1ubuntu0.1
released
tomcat10
jammy
dne
noble
Fixed 10.1.16-1ubuntu0.1~esm4
released
questing
Fixed 10.1.40-1ubuntu1.25.10.1
released
resolute
Fixed 10.1.40-1ubuntu1.26.04.1
released
tomcat11
jammy
dne
noble
dne
questing
ignored
resolute
needed
tomcat6
jammy
dne
noble
dne
questing
dne
resolute
dne
trusty
Fixed 6.0.39-1ubuntu0.1+esm3
released
tomcat7
bionic
not-affected
jammy
dne
noble
dne
questing
dne
resolute
dne
trusty
Fixed 7.0.52-1ubuntu0.16+esm2
released
tomcat8
bionic
needed
jammy
dne
noble
dne
questing
dne
resolute
dne
xenial
needed
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
tomcat
suse enterprise sap 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP7
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP7
9.0.118-150200.108.1
fixed
tomcat-admin-webapps
suse enterprise sap 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP7
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP7
9.0.118-150200.108.1
fixed
tomcat-el-3_0-api
suse enterprise sap 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP7
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP7
9.0.118-150200.108.1
fixed
tomcat-jsp-2_3-api
suse enterprise sap 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP7
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP7
9.0.118-150200.108.1
fixed
tomcat-lib
suse enterprise sap 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP7
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP7
9.0.118-150200.108.1
fixed
tomcat-servlet-4_0-api
suse enterprise sap 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP7
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP7
9.0.118-150200.108.1
fixed
tomcat-webapps
suse enterprise sap 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise sap 15 SP7
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP4
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP5
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP6
9.0.118-150200.108.1
fixed
suse enterprise server 15 SP7
9.0.118-150200.108.1
fixed
tomcat10
suse enterprise sap 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP7
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP7
10.1.55-150200.5.67.1
fixed
tomcat10-admin-webapps
suse enterprise sap 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP7
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP7
10.1.55-150200.5.67.1
fixed
tomcat10-el-5_0-api
suse enterprise sap 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP7
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP7
10.1.55-150200.5.67.1
fixed
tomcat10-jsp-3_1-api
suse enterprise sap 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP7
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP7
10.1.55-150200.5.67.1
fixed
tomcat10-lib
suse enterprise sap 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP7
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP7
10.1.55-150200.5.67.1
fixed
tomcat10-servlet-6_0-api
suse enterprise sap 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP7
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP7
10.1.55-150200.5.67.1
fixed
tomcat10-webapps
suse enterprise sap 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise sap 15 SP7
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP5
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP6
10.1.55-150200.5.67.1
fixed
suse enterprise server 15 SP7
10.1.55-150200.5.67.1
fixed
tomcat11
suse enterprise sap 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise sap 15 SP7
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP7
11.0.22-150600.13.21.1
fixed
tomcat11-admin-webapps
suse enterprise sap 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise sap 15 SP7
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP7
11.0.22-150600.13.21.1
fixed
tomcat11-el-6_0-api
suse enterprise sap 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise sap 15 SP7
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP7
11.0.22-150600.13.21.1
fixed
tomcat11-jsp-4_0-api
suse enterprise sap 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise sap 15 SP7
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP7
11.0.22-150600.13.21.1
fixed
tomcat11-lib
suse enterprise sap 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise sap 15 SP7
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP7
11.0.22-150600.13.21.1
fixed
tomcat11-servlet-6_1-api
suse enterprise sap 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise sap 15 SP7
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP7
11.0.22-150600.13.21.1
fixed
tomcat11-webapps
suse enterprise sap 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise sap 15 SP7
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP6
11.0.22-150600.13.21.1
fixed
suse enterprise server 15 SP7
11.0.22-150600.13.21.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
tomcat10
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat10-admin-webapps
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat10-docs-webapp
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat10-el-5.0-api
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat10-jsp-3.1-api
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat10-lib
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat10-servlet-6.0-api
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat10-webapps
Amazon Linux 2023
1:10.1.55-1.amzn2023.0.1
fixed
tomcat9
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
tomcat9-admin-webapps
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
tomcat9-docs-webapp
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
tomcat9-el-3.0-api
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
tomcat9-jsp-2.3-api
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
tomcat9-lib
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
tomcat9-servlet-4.0-api
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
tomcat9-webapps
Amazon Linux 2023
1:9.0.118-1.amzn2023.0.1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp
http://www.openwall.com/lists/oss-security/2026/05/12/9