RHEL 9 : opentelemetry-collector (RHSA-2026:34359)

high Nessus Plugin ID 324597

Synopsis

The remote Red Hat host is missing one or more security updates for opentelemetry-collector.

Description

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:34359 advisory.

Collector with the supported components for a Red Hat build of OpenTelemetry

Security Fix(es):

* github.com/prometheus/prometheus: Prometheus: Denial of Service via uncontrolled memory allocation in remote read endpoint (CVE-2026-42154)

* github.com/prometheus/prometheus: Prometheus: Information disclosure of Azure OAuth client secret via config API (CVE-2026-42151)

* net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811)

* golang.org/x/net/idna: golang: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)

* golang.org/x/net/html: golang.org/x/net/html: Arbitrary code execution via Cross-Site Scripting (CVE-2026-25681)

* crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 RHEL opentelemetry-collector package based on the guidance in RHSA-2026:34359.

Plugin Details

Severity: High

ID: 324597

File Name: redhat-RHSA-2026-34359.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 7/1/2026

Updated: 7/1/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.15

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-33811

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:N/A:H

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

Vulnerability Information

CPE: cpe:/o:redhat:rhel_eus:9.8, p-cpe:/a:redhat:enterprise_linux:opentelemetry-collector, cpe:/o:redhat:enterprise_linux:9

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/1/2026

Vulnerability Publication Date: 5/4/2026

Reference Information

CVE: CVE-2026-25681, CVE-2026-27145, CVE-2026-33811, CVE-2026-39821, CVE-2026-42151, CVE-2026-42154

CWE: 1289, 1341, 256, 606, 770, 79

RHSA: 2026:34359

Detections

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