# github.com/klauspost/compress (Go) vulnerabilities

2 known vulnerabilities (2 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: v1.20.3 (Oct 12, 2026): no advisory affects it
- Newest unaffected release: v1.20.3 (Oct 12, 2026), the latest release
- Releases: 123 since v1.2.1 (Jan 14, 2017)
- Registry: https://pkg.go.dev/github.com/klauspost/compress
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-116591: v1.2.1 to v1.20.1 (v1.20.2 is outside it)
- CVE-2026-63209: v1.2.1 to v1.18.6 (v1.18.7 is outside it)

## Advisories (2)

### [CVE-2026-116591](https://cve.now/CVE-2026-116591): compress zstd: Panic on two-block frames

- Severity: High 8.7
- Published: Oct 26, 2026
- Affected: fixed in 1.20.2.
- Fixed in v1.20.2 (released Oct 12, 2026, 14 days before disclosure).
- The latest release, v1.20.3, is not affected.

### [CVE-2026-63209](https://cve.now/CVE-2026-63209): Integer Overflow or Wraparound and Out-of-bounds Write in compress

- Severity: High 7.5
- Published: Sep 29, 2026
- Affected: fixed in 1.18.7; from 1.16.0, fixed in 1.18.7.
- Fixed in v1.18.7 (released Jun 30, 2026, 91 days before disclosure).
- The latest release, v1.20.3, is not affected.

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