ESB-2026.5532

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.5532 opentelemetry-collector security update 21 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: opentelemetry-collector Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-33186 CVE-2026-32280 CVE-2026-32281 CVE-2026-32282 CVE-2026-25679 CVE-2026-32283 CVE-2026-33810 CVE-2026-34986 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:19720 Comment: CVSS (Max): 9.1 CVE-2026-33186 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N EPSS (Max): 0.0% (13th) CVE-2026-25679 2026-05-20 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:19720 - Security Advisory Issued: 2026-05-20 Updated: 2026-05-20 Synopsis Opentelemetry-collector security update Type/Severity Security Advisory: Important Topic An update for opentelemetry-collector is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. 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 Collector with the supported components for a Red Hat build of OpenTelemetry Security Fix(es): o net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) o google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation (CVE-2026-33186) o github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object (CVE-2026-34986) o crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281) o crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810) o golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root (CVE-2026-32282) o crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283) o crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280) 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 For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products o Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.6 x86_64 o Red Hat Enterprise Linux Server - AUS 9.6 x86_64 o Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.6 s390x o Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.6 ppc64le o Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.6 aarch64 o Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.6 ppc64le o Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.6 x86_64 o Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.6 aarch64 o Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.6 s390x o Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.6 x86_64 o Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.6 aarch64 o Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.6 ppc64le o Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.6 s390x Fixes o BZ - 2445356 - CVE-2026-25679 net/url: Incorrect parsing of IPv6 host literals in net/url o BZ - 2449833 - CVE-2026-33186 google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation o BZ - 2455470 - CVE-2026-34986 github.com/go-jose/go-jose/v3: github.com/ go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object o BZ - 2456333 - CVE-2026-32281 crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation o BZ - 2456335 - CVE-2026-33810 crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application o BZ - 2456336 - CVE-2026-32282 golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root o BZ - 2456338 - CVE-2026-32283 crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages o BZ - 2456339 - CVE-2026-32280 crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building CVEs o CVE-2026-25679 o CVE-2026-32280 o CVE-2026-32281 o CVE-2026-32282 o CVE-2026-32283 o CVE-2026-33186 o CVE-2026-33810 o CVE-2026-34986 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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