{"id":"ghsa-ghsa-259r-337f-4rfw","seq":2434,"kind":"advisory","title":"Compress/s2: Integer Overflow or Wraparound and Out-of-bounds Write in compress","url":"https://github.com/advisories/GHSA-259r-337f-4rfw","permalink":"https://vulnpulse.app/items/ghsa-ghsa-259r-337f-4rfw","summary":"影響: go:github.com/klauspost/compress <= 1.18.6 → 1.18.7\nSigned Integer Overflow in s2.NewDict Summary A signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. Package - Name: github.com/klauspost/compress/s2 - Ecosystem: Go - Affected ve…","severity":"high","techs":["go","github"],"cves":["CVE-2026-63209"],"tags":["GHSA-259r-337f-4rfw","github.com/klauspost/compress"],"source":{"id":"ghsa","name":"GitHub Advisory Database"},"published_at":"2026-10-20T14:33:33.000Z","fetched_at":"2026-10-21T16:17:46.637Z"}