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CVE-2026-116137medium6.3

adm-zip through 0.6.1 Duplicate-Entry Validation Bypass via Canonically Equivalent Names

Impact

adm-zip through 0.6.1 has a duplicate-entry validation bypass, allowing attackers to evade checks using canonically equivalent entry names, potentially writing malicious content. Attackers need to craft ZIP archives with specific names. The impact is unclear.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

cthackers · VulnCheck

adm-zip

1 range
VulnCheck version evidence

Package identity

pkg:npm/adm-zipExplore adm-zip →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 0.6.1

semver versions

unaffected

unknown

Other versions: unaffected

Original source description

adm-zip through 0.6.1 contains a duplicate-entry validation bypass that allows attackers to evade the readEntries() check by using canonically equivalent entry names like './hello.txt' and 'hello.txt'. Attackers can craft ZIP archives where getEntry() or readAsText() validates benign content while extractAllTo() writes malicious content to the same path, bypassing integrity checks.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-116137

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-436 ↗

Interpretation Conflict

VulnCheck

Related →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

VulnCheck · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:adm-zip_project:adm-zip:*:*:*:*:*:*:*:*

Through (inclusive): 0.6.1

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:adm-zip_project:adm-zip:*:*:*:*:*:*:*:*",
            "versionEndIncluding": "0.6.1"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-25
CISA-ADP

Additional data publisher

2026-10-29

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

References

6 sources
github.com/cthackers/adm-zip/issues/587
issue-trackingVulnCheck
github.com/cthackers/adm-zip
productVulnCheck
github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/zipFile.js
technical-descriptionVulnCheck
github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/adm-zip.js
technical-descriptionVulnCheck
github.com/cthackers/adm-zip/blob/cb2cf9ba4c7c865db426e2de1997cb41194d9872/util/utils.js
technical-descriptionVulnCheck
www.vulncheck.com/advisories/adm-zip-through-0.6.1-duplicate-entry-validation-bypass-via-canonically-equivalent-names
third-party-advisoryVulnCheck