RHSA-2026:68527HighCVSS 8.1

Red Hat Security Advisory: opentelemetry-collector security update

Published
September 17, 2026
Last Modified
September 19, 2026

🔗 CVE IDs covered (10)

CVE-2026-33818 →CVE-2026-39820 →CVE-2026-41178 →CVE-2026-42499 →CVE-2026-42504 →CVE-2026-56853 →CVE-2026-56859 →CVE-2026-56860 →CVE-2026-56858 →CVE-2026-56862 →

📋 Description

CVE-2026-33818 — encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal CVE-2026-39820 — net/mail: golang: Go net/mail: Denial of Service via crafted email inputs CVE-2026-41178 — github.com/open-telemetry/opentelemetry-go: go.opentelemetry.io/otel/baggage: go.opentelemetry.io/otel/propagation: OpenTelemetry-Go: Denial of Service via oversized baggage headers CVE-2026-42499 — net/mail: golang: net/mail: Denial of Service via pathological email address parsing CVE-2026-42504 — mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header CVE-2026-56853 — net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service CVE-2026-56858 — html/template: golang: Go html/template: Cross-Site Scripting via pathological input CVE-2026-56859 — encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue CVE-2026-56860 — net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution CVE-2026-56862 — crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages

🎯 Affected products6

  • Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • opentelemetry-collector-0:0.152.1-2.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • opentelemetry-collector-0:0.152.1-2.el9_4.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • opentelemetry-collector-0:0.152.1-2.el9_4.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • opentelemetry-collector-0:0.152.1-2.el9_4.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • opentelemetry-collector-0:0.152.1-2.el9_4.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: To mitigate this issue, restrict network access to services that process MIME headers from untrusted sources. Implement input validation and sanitization for all incoming data, especially MIME headers, to prevent maliciously crafted content from being processed by applications utilizing the vulnerable Golang MIME package.

🔗 References (13)