RHSA-2026:98479: Important: grafana-pcp security update
The Grafana plugin for Performance Co-Pilot includes datasources for scalable time series from pmseries and Redis, live PCP metrics and bpftrace scripts from pmdabpftrace, as well as several dashboards.Security Fix(es): encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818) net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860) net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853) html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858) crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862) crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031) net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames (CVE-2026-78669) crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates (CVE-2026-111943) 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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/grafana-pcpto a version that resolves this vulnerability.Fixed in 5.1.1-17.el9_9.3 - Upgrade
Upgrade
redhat/grafana-pcp-debuginfoto a version that resolves this vulnerability.Fixed in 5.1.1-17.el9_9.3 - Upgrade
Upgrade
redhat/grafana-pcp-debugsourceto a version that resolves this vulnerability.Fixed in 5.1.1-17.el9_9.3 - Upgrade
Upgrade
redhat/grafana-pcpto a version that resolves this vulnerability.Fixed in 5.1.1-17.el9_9.3.aa - Upgrade
Upgrade
redhat/grafana-pcp-debuginfoto a version that resolves this vulnerability.Fixed in 5.1.1-17.el9_9.3.aa - Upgrade
Upgrade
redhat/grafana-pcp-debugsourceto a version that resolves this vulnerability.Fixed in 5.1.1-17.el9_9.3.aa
Event History
Frequently Asked Questions
Which installed packages are covered by this update?
The advisory lists redhat/grafana-pcp, redhat/grafana-pcp-debuginfo, and redhat/grafana-pcp-debugsource.
What types of impact are addressed?
The fixes include several denial-of-service issues in Go components, a cross-site scripting issue in html/template, and a man-in-the-middle risk involving untrusted intermediate certificates in crypto/x509.
Which network-facing functionality may be relevant when triaging exposure?
The listed issues include HTTP/2 handling in net/http and golang.org/x/net/http2, TLS processing, URL path resolution, and certificate validation. Exposure depends on whether the Grafana PCP deployment accepts or processes attacker-controlled traffic or inputs through those components.