CVE-2026-63209— Integer Overflow or Wraparound and Out-of-bounds Write in compress
一分钟漏洞结论
影响对象
klauspost compress
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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 MaxI
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一、 漏洞 CVE-2026-63209 基础信息
漏洞信息
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Vulnerability Title
Integer Overflow or Wraparound and Out-of-bounds Write in compress
来源: CVE Program / CVE List V5
Vulnerability 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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-63209 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-63209 其他参考 (3)
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https://github.com/klauspost/compress/releases/tag/v1.18.7 x_refsource_MISC
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https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw x_refsource_CONFIRM
IV. Related Vulnerabilities
V. Comments for CVE-2026-63209
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