CVE-2026-43513
high
CVSS v3
7.5
CVSS v2
—
VIR risk
7.5
Description
Apache Tomcat: LockOutRealm treats user names as case-sensitive
Predictions
Exploit likelihood
83%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-43513
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-43513.html
Vendor advisory: security@apache.org — https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 9.0.70-2 |
| debian | forky | fixed | 9.0.70-2 |
| debian | sid | fixed | 11.0.22-1 |
| debian | trixie | fixed | 9.0.70-2 |
| debian | bullseye | fixed | 9.0.70-2 |
Package impact
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| apache | tomcat | {"startIncluding":"7.0.0","endIncluding":"7.0.109"} | |
References
- https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp
- http://www.openwall.com/lists/oss-security/2026/05/12/9
- https://nvd.nist.gov/vuln/detail/CVE-2026-43513
- https://github.com/apache/tomcat/commit/4a90d3fa93988c447cd5bb7482f76ff70d7f15c2
- https://github.com/apache/tomcat/commit/6dd75beb55bd42fc5f78e929596b25018cd17717
- https://github.com/apache/tomcat/commit/83f3e51df7b87f5f6e626951c575ded1a512e8ef
- https://github.com/apache/tomcat
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html
- https://www.suse.com/security/cve/CVE-2026-43513.html
- https://security-tracker.debian.org/tracker/CVE-2026-43513
- https://github.com/advisories/GHSA-5mp6-jrq3-r938
CWEs
CWE-178
Verify integrity in audit chain (admin only). AS-IS.