An update for golang is now available for openEuler-24.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-4435 Final 1.0 1.0 2026-10-22 Initial 2026-10-22 2026-10-22 openEuler SA Tool V1.0 2026-10-22 golang security update An update for golang is now available for openEuler-24.03-LTS-SP1 . Security Fix(es): On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.(CVE-2026-111943) When http.Transport sends an HTTP/1 CONNECT request with a non-empty Request.Body, it writes the body directly to the connection without framing after the request headers. If the server rejects the CONNECT request with a non-2xx keep-alive response, Transport returns the connection to the idle pool. Because CONNECT requests do not have a request body, the server may interpret the trailing body bytes as a subsequent pipelined HTTP/1.1 request on the connection, leaving the pooled connection desynchronized and causing the next caller that reuses it to read the response to the injected request. In reverse proxies (including httputil.ReverseProxy) that forward CONNECT requests through a shared Transport, this can lead to cross-user response poisoning.(CVE-2026-56866) Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling.(CVE-2026-78660) Parsing a multipart form can bypass memory limits and read an arbitrarily long line into memory when the remaining limit at the start of a part is less than 400 bytes.(CVE-2026-94440) An update for golang is now available for openEuler-24.03-LTS-SP1. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High golang https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4435 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-111943 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-56866 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-78660 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-94440 https://nvd.nist.gov/vuln/detail/CVE-2026-111943 https://nvd.nist.gov/vuln/detail/CVE-2026-56866 https://nvd.nist.gov/vuln/detail/CVE-2026-78660 https://nvd.nist.gov/vuln/detail/CVE-2026-94440 openEuler-24.03-LTS-SP1 golang-1.21.4-48.oe2403sp1.aarch64.rpm golang-1.21.4-48.oe2403sp1.src.rpm golang-1.21.4-48.oe2403sp1.x86_64.rpm golang-devel-1.21.4-48.oe2403sp1.noarch.rpm golang-help-1.21.4-48.oe2403sp1.noarch.rpm On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy. 2026-10-22 CVE-2026-111943 openEuler-24.03-LTS-SP1 Medium 6.8 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N golang security update 2026-10-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4435 When http.Transport sends an HTTP/1 CONNECT request with a non-empty Request.Body, it writes the body directly to the connection without framing after the request headers. If the server rejects the CONNECT request with a non-2xx keep-alive response, Transport returns the connection to the idle pool. Because CONNECT requests do not have a request body, the server may interpret the trailing body bytes as a subsequent pipelined HTTP/1.1 request on the connection, leaving the pooled connection desynchronized and causing the next caller that reuses it to read the response to the injected request. In reverse proxies (including httputil.ReverseProxy) that forward CONNECT requests through a shared Transport, this can lead to cross-user response poisoning. 2026-10-22 CVE-2026-56866 openEuler-24.03-LTS-SP1 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N golang security update 2026-10-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4435 Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling. 2026-10-22 CVE-2026-78660 openEuler-24.03-LTS-SP1 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N golang security update 2026-10-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4435 Parsing a multipart form can bypass memory limits and read an arbitrarily long line into memory when the remaining limit at the start of a part is less than 400 bytes. 2026-10-22 CVE-2026-94440 openEuler-24.03-LTS-SP1 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H golang security update 2026-10-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4435