An update for golang is now available for openEuler-24.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-3717 Final 1.0 1.0 2026-09-14 Initial 2026-09-14 2026-09-14 openEuler SA Tool V1.0 2026-09-14 golang security update An update for golang is now available for openEuler-24.03-LTS-SP1 . Security Fix(es): Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures.(CVE-2026-33818) When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.(CVE-2026-56853) Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.(CVE-2026-56859) Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.(CVE-2026-56860) Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.(CVE-2026-56862) A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy(CVE-2026-56864) A malicious GOPROXY was previously capable of forging up to two sumdb tiles that allow for a requested module to bypass the GOSUMDB check and persist attacker-controlled module content to a local Go module cache. This attack allows for a malicious GOPROXY to serve malicious module content that cannot be detected by evaluating the transparency log. All tiles are now correctly verified against their parents. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy(CVE-2026-56865) 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-2026-3717 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-33818 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-56853 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-56859 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-56860 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-56862 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-56864 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-56865 https://nvd.nist.gov/vuln/detail/CVE-2026-33818 https://nvd.nist.gov/vuln/detail/CVE-2026-56853 https://nvd.nist.gov/vuln/detail/CVE-2026-56859 https://nvd.nist.gov/vuln/detail/CVE-2026-56860 https://nvd.nist.gov/vuln/detail/CVE-2026-56862 https://nvd.nist.gov/vuln/detail/CVE-2026-56864 https://nvd.nist.gov/vuln/detail/CVE-2026-56865 openEuler-24.03-LTS-SP1 golang-1.21.4-46.oe2403sp1.aarch64.rpm golang-1.21.4-46.oe2403sp1.src.rpm golang-1.21.4-46.oe2403sp1.x86_64.rpm golang-devel-1.21.4-46.oe2403sp1.noarch.rpm golang-help-1.21.4-46.oe2403sp1.noarch.rpm Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures. 2026-09-14 CVE-2026-33818 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 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3717 When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this. 2026-09-14 CVE-2026-56853 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 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3717 Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion. 2026-09-14 CVE-2026-56859 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 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3717 Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations. 2026-09-14 CVE-2026-56860 openEuler-24.03-LTS-SP1 Medium 5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H golang security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3717 Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely. 2026-09-14 CVE-2026-56862 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 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3717 A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy 2026-09-14 CVE-2026-56864 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 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3717 A malicious GOPROXY was previously capable of forging up to two sumdb tiles that allow for a requested module to bypass the GOSUMDB check and persist attacker-controlled module content to a local Go module cache. This attack allows for a malicious GOPROXY to serve malicious module content that cannot be detected by evaluating the transparency log. All tiles are now correctly verified against their parents. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy 2026-09-14 CVE-2026-56865 openEuler-24.03-LTS-SP1 High 8.4 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H golang security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3717