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CVE-2026-114104— adm-zip before 0.6.1 Duplicate ZIP Entry Name Validation Bypass

Quick assessment

Affected
cthackers adm-zip
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

0.6.1 版本之前的 adm-zip 存在一个条目解析不一致的漏洞，攻击者可通过提供包含重复条目名称的 ZIP 压缩包来绕过内容验证。攻击者可构造此类压缩包，使得 getEntry() 返回最后一个重复条目，而 extractAll() 却写入第一个重复条目，从而导致未经校验的字节被写入磁盘。

CVSS 5.9 · Medium
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I. Basic Information for CVE-2026-114104

Vulnerability Information
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Vulnerability Title
adm-zip before 0.6.1 Duplicate ZIP Entry Name Validation Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
adm-zip before 0.6.1 contains an inconsistent entry resolution vulnerability that allows attackers to bypass content validation by supplying ZIP archives with duplicate entry names. Attackers can craft archives where getEntry() returns the last duplicate while extractAllTo() writes the first, causing unvalidated bytes to be written to disk.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
解释冲突
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
cthackers adm-zip 0 ~ 0.6.1 -

II. Public POCs for CVE-2026-114104

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III. Intelligence Information for CVE-2026-114104

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Other References for CVE-2026-114104 (2)

Same Patch Batch · cthackers · 2026-10-21 · 4 CVEs total

CVE-2026-114102 7.5 HIGH adm-zip before 0.6.1 Denial of Service via inflateAsync Unhandled Error Event
CVE-2026-114105 6.2 MEDIUM Adm-zip before 0.6.1 Privilege Escalation via keepOriginalPermission Setuid Bits
CVE-2026-114103 5.3 MEDIUM adm-zip 0.6.0 Decompression Bomb Guard Bypass via getDataAsync()

IV. Related Vulnerabilities

Same product: adm-zip
Same vendor: cthackers
Same weakness: CWE-436

V. Comments for CVE-2026-114104

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