CVE-2026-63209

7.5 Élevée

Publiée le 29/09/2026 à 17:17 · Modifiée le 30/09/2026 à 21:57 · Analyse NVD reportée · Source : security-advisories@github.com

Description

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.

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Produits concernés

klauspost compress

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.5 Élevée	security-advisories@github.com	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Faiblesses (CWE)

CWE-190
CWE-787

Références

https://github.com/klauspost/compress/commit/539243b8823ee8f03e49969823d57c348c917536
https://github.com/klauspost/compress/releases/tag/v1.18.7
https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw
https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories