Important: opentelemetry-collector security update
Collector with the supported components for a AlmaLinux 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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Collector with the supported components for a AlmaLinux 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.
05 / REFERENCES
Further evidence
- https://access.redhat.com/errata/RHSA-2026:34357
- https://access.redhat.com/security/cve/CVE-2026-25681
- https://access.redhat.com/security/cve/CVE-2026-27145
- https://access.redhat.com/security/cve/CVE-2026-33811
- https://access.redhat.com/security/cve/CVE-2026-39821
- https://access.redhat.com/security/cve/CVE-2026-42151
- https://access.redhat.com/security/cve/CVE-2026-42154
- https://bugzilla.redhat.com/2466505
- https://bugzilla.redhat.com/2466507
- https://bugzilla.redhat.com/2467822
- https://bugzilla.redhat.com/2480756
- https://bugzilla.redhat.com/2480761
- https://bugzilla.redhat.com/2484207
- https://errata.almalinux.org/10/ALSA-2026-34357.html