Detections
Analytics

Oracle Linux 9 : tomcat (ELSA-2026-26323)

high Nessus Plugin ID 322806

Synopsis

The remote Oracle Linux host is missing a security update.

Description

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-26323 advisory.

 - Resolves:
 Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled (CVE-2026-34500)
 - Resolves:
 Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token (CVE-2026-34487)
 - Resolves:
 Tomcat: The fix for CVE-2026-29146 allowed the bypass of the EncryptInterceptor (CVE-2026-34486)
 - Resolves:
 Tomcat: Incomplete escaping of JSON access logs (CVE-2026-34483)
 - Resolves:
 Tomcat: The fix for CVE-2025-66614 was incomplete (CVE-2026-32990)
 - Resolves:
 Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default (CVE-2026-29146)
 - Resolves:
 Tomcat: OCSP checks sometimes soft-fail even when soft-fail is disabled (CVE-2026-29145)
 - Resolves:
 Tomcat: Configured TLS cipher preference order not preserved (CVE-2026-29129)
 - Resolves:
 Tomcat: Occasionally open redirect (CVE-2026-25854)
 - Resolves:
 Tomcat: Request smuggling via invalid chunk extension (CVE-2026-24880)
 - Resolves:
 Tomcat: Incomplete OCSP verification checks (CVE-2026-24734)
 - Resolves:
 Tomcat: Security constraint bypass (CVE-2026-24733)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2026-26323.html

Plugin Details

Severity: High

ID: 322806

File Name: oraclelinux_ELSA-2026-26323.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/25/2026

Updated: 6/25/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N

CVSS Score Source: CVE-2026-24734

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:oracle:linux:tomcat-servlet-4.0-api, p-cpe:/a:oracle:linux:tomcat-jsp-2.3-api, p-cpe:/a:oracle:linux:tomcat-el-3.0-api, cpe:/o:oracle:linux:9, p-cpe:/a:oracle:linux:tomcat-webapps, p-cpe:/a:oracle:linux:tomcat-lib, p-cpe:/a:oracle:linux:tomcat-docs-webapp, p-cpe:/a:oracle:linux:tomcat-admin-webapps, p-cpe:/a:oracle:linux:tomcat

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2026

Vulnerability Publication Date: 1/23/2026

Reference Information

CVE: CVE-2026-24734

IAVA: 2026-A-0175-S