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  4. CVE 2026 114104 adm zip before 061 duplicate zip entry name
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Back to active CVEs
High · CVSS 8.2CVE-2026-114104

adm-zip before 0.6.1 Duplicate ZIP Entry Name Validation BypassCVE-2026-114104

Answer in brief

CVE-2026-114104 records a High severity (CVSS 8.2) vulnerability in adm-zip before 0.6.1 Duplicate ZIP Entry Name Validation Bypass. The current sources do not mark it as known exploited. The current feed maps cthackers/adm-zip (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 21, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.2
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps cthackers/adm-zip (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
cthackers/adm-zipgeneric>=0 <0.6.10.6.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for cthackers/adm-zip.
  2. 2Review the reported fix. Update cthackers/adm-zip to 0.6.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • adm-zip before 0.6.1 Denial of Service via inflateAsync Unhandled Error EventSame cthackers/adm-zip package
  • adm-zip 0.6.0 Decompression Bomb Guard Bypass via getDataAsync()Same cthackers/adm-zip package
  • Adm-zip before 0.6.1 Privilege Escalation via keepOriginalPermission Setuid BitsSame cthackers/adm-zip package
  • Vyper through 0.5.0b1 Literal Value Manipulation via Line SeparatorsAlso CWE-436

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-436
Source
CVE List V5
Source checked
Oct 21, 2026
References
2 linked sources
Open source record