RHSA-2026:61253 — Security Advisory

An update for golang is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

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.

The golang packages provide the Go programming language compiler.

Security Fix(es):

• crypto/x509: Incorrect enforcement of email constraints in crypto/x509 (CVE-2026-27137)

• crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810)

• net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)

• cmd/go: golang: Go command (cmd/go): Integrity bypass due to checksum validation flaw via malicious module proxy (CVE-2026-42501)

• html/template: golang: Go html/template: Cross-Site Scripting via improper URL escaping in meta tag content (CVE-2026-39823)

• cmd/go: golang: Go 'go bug' command: Arbitrary file overwrite via symlink attack (CVE-2026-39819)

• net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame (CVE-2026-33814)

• net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820)

• net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811)

• net/http/httputil: golang: net/http/httputil: ReverseProxy forwards hidden query parameters, potentially bypassing security controls (CVE-2026-39825)

• cmd/go: golang: Go tool pack: Arbitrary file write via malicious archive extraction (CVE-2026-39817)

• html/template: golang: html/template: Cross-site scripting due to incorrect script tag escaping (CVE-2026-39826)

• golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)

• net/textproto: golang: Golang net/textproto: Misleading error messages via input injection (CVE-2026-42507)

• crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145)

• golang: Go os.Root: Symlink following vulnerability allows directory traversal (CVE-2026-39822)

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.