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CVE-2026-53404

Apache Tomcat: Bad ornext processing in RewriteValve

HIGH
7.3
CVSS Score
Published: June 29, 2026 at 08:39 PM UTC
Updated: October 25, 2026 at 09:10 PM UTC
1 product affected across 1 vendorTomcat

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Severity
HIGH7.3
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tomcat· Apache
95%
10.1.0 ≤ v < 10.1.5611.0.0 ≤ v < 11.0.238.5.0 ≤ v ≤ 8.5.1009.0.0 ≤ v < 9.0.11910.1.0-M111.0.0-M18.5.09.0.0.M1
Affected range stops below 10.1.56, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.0.23, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 8.0.0 (unaffected)
Affected range stops below 9.0.119, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/rdhpghgfskrdmw9hqzjgjrtw538smpmz
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/06/29/21

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-670

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