{"id":"CVE-2026-27143","title":"Arithmetic over induction variables in loops were not correctly checked for underflow or overflow","summary":"Arithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid indexing to occur at runtime, potentially leading to memory corruption.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"golang","product":"go","affected":["go < 1.25.9","go >= 1.26.0, < 1.26.2"],"patched":["go 1.26.2"],"published":"2026-04-08","updated":"2026-07-25","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-27143","references":[{"url":"https://go.dev/cl/763765","label":"security@golang.org"},{"url":"https://go.dev/issue/78333","label":"security@golang.org"},{"url":"https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU","label":"security@golang.org"},{"url":"https://pkg.go.dev/vuln/GO-2026-4868","label":"security@golang.org"}],"tags":["nvd"],"epss":0.00536,"epssPercentile":0.43922,"ingestedAt":"2026-07-25T23:05:58.516Z","slug":"CVE-2026-27143","body":"## Overview\n\nArithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid indexing to occur at runtime, potentially leading to memory corruption.\n\n## Affected\n\n- `go < 1.25.9`\n- `go >= 1.26.0, < 1.26.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `go 1.26.2`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}