CVE-2026-116591

compress provides various compression algorithms. Prior to 1.20.2, the zstd DecodeAll and streaming decoder paths can panic when a crafted two-block frame reaches huff0.ReadTable with an FSE normalized count of 32768 that readNCount stores in int16 as -32768. The wrapped count allows buildDtable to retain stale fse.Scratch decode-table state from the prior block, and nextFast then derives an out-of-range state and indexes beyond the table instead of returning a decode error. Both blocks are required to preserve and then reuse the stale state, allowing untrusted zstd input to crash an application. This issue is fixed in version 1.20.2.

CVSS

No CVSS.

References

Link	Resource
https://github.com/klauspost/compress/commit/7f5d8528720c895a6106f201719f87eb030a565d
https://github.com/klauspost/compress/releases/tag/v1.20.2
https://github.com/klauspost/compress/security/advisories/GHSA-fpmh-frq8-7rj8

Configurations

No configuration.

History

26 Oct 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-26 22:16

Updated : 2026-10-27 16:03

NVD link : CVE-2026-116591

Mitre link : CVE-2026-116591

CVE.ORG link : CVE-2026-116591

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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