RHSA-2026:96076: Important: osbuild-composer security update

An image building service based on osbuild It is inspired by lorax-composer and exposes the same API. As such, it is a drop-in replacement.Security Fix(es): crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption (CVE-2025-68121) crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281) crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810) crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280) golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821) mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504) github.com/labstack/echo: Echo: Unauthorized Information Disclosure via URL Path Decoding Discrepancy (CVE-2026-55677) 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) encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859) net/http: golang: golang: Denial of Service via crafted HTTP Range headers (CVE-2026-78667) crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031) net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing (CVE-2026-94440) 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) 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.