Detections
Analytics

Oracle Linux 9 : tomcat (ELSA-2026-18916)

medium Nessus Plugin ID 323683

Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-18916 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 these issues 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-2026-18916.html

Plugin Details

Severity: Medium

ID: 323683

File Name: oraclelinux_ELSA-2026-18916.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/29/2026

Updated: 6/29/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2025-55754

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.6

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 2.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2025-46701

Vulnerability Information

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/29/2026

Vulnerability Publication Date: 5/12/2025

Reference Information

CVE: CVE-2025-46701, CVE-2025-55668, CVE-2025-55754

IAVA: 2025-A-0389-S, 2025-A-0582-S, 2025-A-0803-S