RHSA-2026:63124HighCVSS 8.1

Red Hat Security Advisory: grafana-pcp security update

Published
September 3, 2026
Last Modified
September 4, 2026

🔗 CVE IDs covered (6)

CVE-2026-56853 →CVE-2026-56858 →CVE-2026-56860 →CVE-2026-56862 →CVE-2026-33818 →CVE-2026-42504 →

📋 Description

CVE-2026-33818 — encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal 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-2026-56860 — 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 products14

  • Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-0:5.1.1-18.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-0:5.1.1-18.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-0:5.1.1-18.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-0:5.1.1-18.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-0:5.1.1-18.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debuginfo-0:5.1.1-18.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debuginfo-0:5.1.1-18.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debuginfo-0:5.1.1-18.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debuginfo-0:5.1.1-18.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debugsource-0:5.1.1-18.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debugsource-0:5.1.1-18.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debugsource-0:5.1.1-18.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)
  • grafana-pcp-debugsource-0:5.1.1-18.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)

✅ 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: 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 (9)