Vulnerability in toolchain (CVE-2026-27144)
Summary
Vulnerability in toolchain (CVE-2026-27144). Data can be tampered with by attackers. Mitigation: upgrade to 1.25.9, 1.26.2 or later.
Original description
The description as published by the source.
The compiler is meant to unwrap pointers which are the operands of a memory move; a no-op interface conversion prevented the compiler from making the correct determination about non-overlapping moves, potentially leading to memory corruption at runtime.
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-27144 has been found in toolchain.
Data can be tampered with by attackers. CVSS score: 7.1/10.
What to do: upgrade toolchain to 1.25.9, 1.26.2 or later.
If unsure, ask your IT team or search "toolchain CVE-2026-27144" on the vendor's site.
CVE-2026-27144 (toolchain) — CWE-843 / CVSS v3 7.1
Attack vector: local / no user interaction
Patched: 1.25.9, 1.26.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-843) exists in toolchain.
Check the vendor advisory for the affected versions of toolchain.
Severity: High (CVSS 7.1/10). Data can be tampered with by attackers.
Update to 1.25.9, 1.26.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'toolchain' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'toolchain' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
toolchainを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade toolchain to 1.25.9, 1.26.2ステージング環境で 1.25.9, 1.26.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-27144 golang-1.15
- Ubuntu UBUNTU-CVE-2026-27144 golang-1.10
References
- advisory nvd.nist.gov
- advisory github.com
- web go.dev
- web go.dev
- web groups.google.com
- web pkg.go.dev
- web pkg.go.dev