Is CVE-2026-59083 actively exploited?

No active exploitation of CVE-2026-59083 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-59083 be exploited remotely?

Yes. CVE-2026-59083 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-59083?

CVE-2026-59083 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2026-59083

CWE-177Published: July 14, 2026· Updated: Jul 14, 2026

9.1

CVSS v3.1

EPSS:0.16%probability of exploitation in 30 daysPercentile:5.2th

Official Description

Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, 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 11.0.24, 10.1.57 or 9.0.120, which fix the issue.

NVD Source

Risk Analysis

This critical vulnerability in Apache Tomcat's rewrite valve allows an attacker to bypass security restrictions by manipulating URL encoding. With a CVSS score of 9.1, this flaw poses a significant risk for unauthorized access to sensitive information or system compromise. The lack of an EPSS score means the likelihood of exploitation is not yet quantified, but the high CVSS score indicates urgency.

No public exploit is currently known for this vulnerability. However, its network attack vector and low attack complexity mean it is remotely exploitable without user interaction.

Recommended Action

Users are strongly recommended to upgrade their Apache Tomcat installations to version 11.0.24, 10.1.57, or 9.0.120 to address this issue.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-59083 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.