Red Hat Security Advisory: opentelemetry-collector security update
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.
AI Analysis
Technical Summary
This Red Hat security advisory covers several vulnerabilities in components used in Red Hat Enterprise Linux 10 and related products, including the opentelemetry-collector, Grafana, Prometheus, and golang packages. Notable vulnerabilities include CVE-2026-25681 (arbitrary code execution via cross-site scripting in golang.org/x/net/html), CVE-2026-39821 (privilege escalation via incorrect Punycode label processing in golang.org/x/net/idna), CVE-2026-42154 (denial of service via uncontrolled memory allocation in Prometheus remote read endpoint), CVE-2026-42151 (information disclosure of Azure OAuth client secret in Prometheus config API), CVE-2026-33811 (denial of service via long CNAME response in Go net package), and CVE-2026-27145 (denial of service via excessive processing of DNS SAN entries in golang crypto/x509). Red Hat has issued updated packages to address these vulnerabilities across multiple architectures and product variants, including Red Hat Enterprise Linux 10, Red Hat OpenShift logging subsystems, Multicluster Global Hub, and others. The advisory includes detailed references and instructions for applying the updates.
Potential Impact
The vulnerabilities collectively allow for privilege escalation, arbitrary code execution via cross-site scripting, denial of service conditions, and information disclosure of sensitive OAuth client secrets. These impacts can compromise system integrity, availability, and confidentiality if exploited. The advisory rates the overall security impact as Important (high severity), indicating significant risk if unpatched. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
Red Hat has released official security updates addressing these vulnerabilities. Users and administrators should apply the provided patches and updated packages for Red Hat Enterprise Linux 10 and related products as detailed in the Red Hat advisories RHSA-2026:34357 and RHSA-2026:41030. The vendor manages remediation through these updates; no additional mitigation steps are specified beyond applying the official fixes. Check the Red Hat advisory pages for detailed update instructions and package versions.
Red Hat Security Advisory: opentelemetry-collector security update
Description
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.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory covers several vulnerabilities in components used in Red Hat Enterprise Linux 10 and related products, including the opentelemetry-collector, Grafana, Prometheus, and golang packages. Notable vulnerabilities include CVE-2026-25681 (arbitrary code execution via cross-site scripting in golang.org/x/net/html), CVE-2026-39821 (privilege escalation via incorrect Punycode label processing in golang.org/x/net/idna), CVE-2026-42154 (denial of service via uncontrolled memory allocation in Prometheus remote read endpoint), CVE-2026-42151 (information disclosure of Azure OAuth client secret in Prometheus config API), CVE-2026-33811 (denial of service via long CNAME response in Go net package), and CVE-2026-27145 (denial of service via excessive processing of DNS SAN entries in golang crypto/x509). Red Hat has issued updated packages to address these vulnerabilities across multiple architectures and product variants, including Red Hat Enterprise Linux 10, Red Hat OpenShift logging subsystems, Multicluster Global Hub, and others. The advisory includes detailed references and instructions for applying the updates.
Potential Impact
The vulnerabilities collectively allow for privilege escalation, arbitrary code execution via cross-site scripting, denial of service conditions, and information disclosure of sensitive OAuth client secrets. These impacts can compromise system integrity, availability, and confidentiality if exploited. The advisory rates the overall security impact as Important (high severity), indicating significant risk if unpatched. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
Red Hat has released official security updates addressing these vulnerabilities. Users and administrators should apply the provided patches and updated packages for Red Hat Enterprise Linux 10 and related products as detailed in the Red Hat advisories RHSA-2026:34357 and RHSA-2026:41030. The vendor manages remediation through these updates; no additional mitigation steps are specified beyond applying the official fixes. Check the Red Hat advisory pages for detailed update instructions and package versions.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:34364
- Cve Count
- 10
- Additional Cves
- ["CVE-2026-32285","CVE-2026-33186","CVE-2026-33811","CVE-2026-33813","CVE-2026-34986","CVE-2026-39820","CVE-2026-39821","CVE-2026-42154","CVE-2026-42499"]
- Cvss Version
- null
Threat ID: 6a45998227e9c797194186fa
Added to database: 07/01/2026, 22:49:38 UTC
Last enriched: 08/09/2026, 16:03:58 UTC
Last updated: 08/16/2026, 00:41:12 UTC
Views: 141
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