RHSA-2026:73538 - Security Advisory

Topic

An update is now available for Red Hat Lightspeed (formerly Insights) for Runtimes on RHEL 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

An update is now available for Red Hat Lightspeed (formerly Insights) for Runtimes on RHEL 9.

Security fix(es):

• gRPC-Go: DoS via malformed RPC requests (CVE-2026-84445)
• Go net/mail: DoS via pathological email address parsing (CVE-2026-42499)
• Go net/mail: DoS via crafted email inputs (CVE-2026-39820)
• Golang MIME: DoS via maliciously-crafted MIME header (CVE-2026-42504)
• Go encoding/asn1: DoS via excessive recursion in Unmarshal (CVE-2026-33818)
• Golang crypto/tls: DoS via indefinite KeyUpdate messages (CVE-2026-56862)
• Go html/template: XSS via pathological input (CVE-2026-56858)
• Go net/http: Unencrypted HTTP/2 DoS (CVE-2026-56853)
• Go: DoS via XML decoding recursion depth issue (CVE-2026-56859)
• golang net/url: DoS from quadratic complexity in path resolution (CVE-2026-56860)
• OpenTelemetry-Go: DoS via oversized baggage headers (CVE-2026-41178)

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.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Lightspeed (formerly Insights) for Runtimes

Fixes

CVEs

• CVE-2026-33818
• CVE-2026-39820
• CVE-2026-41178
• CVE-2026-42499
• CVE-2026-42504
• CVE-2026-56853
• CVE-2026-56858
• CVE-2026-56859
• CVE-2026-56860
• CVE-2026-56862
• CVE-2026-84445

References

• https://access.redhat.com/security/updates/classification/