CVE-2026-59083VulnerabilityPublished 10 Jul 2026Updated 22 Oct 2026

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Affects Red Hat tomcat6Source GCVE Database

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Mentioned vulnerabilities

CVE-2026-59084

Authoritative record:CVE-2026-59083· Critical 9.1

Not known to be exploited · CVSS 9.1 Critical.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score

9.1Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 14 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Ubuntu 26.10tomcat10`pkg:deb/ubuntu/tomcat10?arch=source&distro=stonking`Other threats	Affected 10.1.40-1ubuntu1 – 10.1.57~us1-0ubuntu1 7 affected builds	Fixed in–
Ubuntu 26.10tomcat11`pkg:deb/ubuntu/tomcat11?arch=source&distro=stonking`Other threats	Affected 11.0.18-1 – 11.0.24-1ubuntu1 5 affected builds	Fixed in–
Ubuntu 26.10tomcat9`pkg:deb/ubuntu/tomcat9?arch=source&distro=stonking`Other threats	Affected =9.0.115-1 =9.0.115-1ubuntu1 =9.0.118-1	Fixed in–
Ubuntu 26.04 LTStomcat10`pkg:deb/ubuntu/tomcat10?arch=source&distro=resolute`Other threats	Affected =10.1.40-1ubuntu1 =10.1.40-1ubuntu1.26.04.1 =10.1.55-1ubuntu2~26.04.1	Fixed in–
Ubuntu 26.04 LTStomcat9`pkg:deb/ubuntu/tomcat9?arch=source&distro=resolute`Other threats	Affected 9.0.95-1ubuntu1 – 9.0.118-1~26.04.1 5 affected builds	Fixed in–
Ubuntu 26.04 LTStomcat11`pkg:deb/ubuntu/tomcat11?arch=source&distro=resolute`Other threats	Affected 11.0.6-1 – 11.0.22-2ubuntu2~26.04.1 6 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat advises reviewing existing EncryptInterceptor configurations to ensure they meet secure best practices. If the EncryptInterceptor is not actively used, no specific action is required. No explicit patch or update is mandated by the advisory, but the update to tomcat10 RPMs is available. Users should consult Red Hat's official guidance and apply the RPM updates as appropriate.

Description

This update includes the following RPMs: tomcat10: * tomcat10-10.1.57-1.hum1 (noarch) * tomcat10-admin-webapps-10.1.57-1.hum1 (noarch) * tomcat10-common-10.1.57-1.hum1 (noarch) * tomcat10-docs-webapp-10.1.57-1.hum1 (noarch) * tomcat10-el-5.0-api-10.1.57-1.hum1 (noarch) * tomcat10-jsp-3.1-api-10.1.57-1.hum1 (noarch) * tomcat10-lib-10.1.57-1.hum1 (noarch) * tomcat10-servlet-6.0-api-10.1.57-1.hum1 (noarch) * tomcat10-user-instance-10.1.57-1.hum1 (noarch) * tomcat10-webapps-10.1.57-1.hum1 (noarch) * tomcat10-10.1.57-1.hum1.src (src)

Impact

The impact is low severity and relates to potential confidentiality and integrity compromise due to insecure configurations of the EncryptInterceptor component in Apache Tomcat. There is no direct code vulnerability; the risk arises from insufficient documentation leading to misconfiguration. No availability impact or known exploitation is reported.

Summary

The advisory concerns CVE-2026-59084, a vulnerability in Apache Tomcat where insufficient technical documentation for the EncryptInterceptor component can cause administrators to deploy it with insecure settings. This vulnerability does not stem from a coding error but from unclear guidance that may lead to weakened security configurations. The update includes RPM packages for tomcat10 in Red Hat Hardened Images. The impact is limited to potential confidentiality and integrity issues if the EncryptInterceptor is misconfigured. Red Hat products using Apache Tomcat, such as Red Hat Enterprise Linux and JBoss Web Server, are affected. The advisory recommends verifying EncryptInterceptor configurations to ensure security best practices are followed. If the component is not in use, no action is required. No explicit patch or fix version is provided, and no exploits are known in the wild.

CWE-807Reliance on Untrusted Inputs in a Security Decision (opens in a new tab)
Base weaknessLikelihood of exploit: HighOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.
Architecture and Design · Attack Surface Reduction
Store state information and sensitive data on the server side only.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks…
OWASP Cheat Sheets
Secure Design Principles (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-1188Initialization of a Resource with an Insecure Default (opens in a new tab)
Base weakness
The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.
OWASP Cheat Sheets
Forgot Password (opens in a new tab)
OWASP ASVS 4.0.3
V2.3.1 (opens in a new tab)
V2.6.2 (opens in a new tab)
V2.7.6 (opens in a new tab)
Attack patterns
Exploitation of Thunderbolt Protection Flaws (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 16 Aug 2026, 17:44 UTC

WeaknessesCWE-807, CWE-1188

Technical details

References

Community reviews

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