Integer Overflow or Wraparound Affecting golang-github-klauspost-compress package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.37% (28th percentile)

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  • Snyk IDSNYK-ECHOLATEST-GOLANGGITHUBKLAUSPOSTCOMPRESS-20360697
  • published1 Oct 2026
  • disclosed29 Sept 2026

Introduced: 29 Sep 2026

NewCVE-2026-63209  (opens in a new tab)
CWE-190  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest golang-github-klauspost-compress.

NVD Description

Note: Versions mentioned in the description apply only to the upstream golang-github-klauspost-compress package and not the golang-github-klauspost-compress package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

compress provides various compression algorithms. Prior to version 1.18.7, 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. This issue has been patched in version 1.18.7.

CVSS Base Scores

version 3.1