High severity · published Jun 29, 2026
CVE-2026-53404
Apache Tomcat: Bad ornext processing in RewriteValve
7.3
CVSS
0.7%
EPSS
No
On KEV
Description
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected.
Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tomcat · Apache
11.0.0-M1 through 11.0.22; 10.1.0-M1 through 10.1.55; 9.0.0.M1 through 9.0.118; 8.5.0 through 8.5.100 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53404
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53404
Vendor Advisory
https://lists.apache.org/thread/rdhpghgfskrdmw9hqzjgjrtw538smpmz
Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/06/29/21
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