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Vulnerabilities

Vulnerability · CVE-2026-114103

adm-zip: getDataAsync() bypasses the maxOutputLength size guard enforced by the synchronous getData() path

Published Sep 29, 2026 · catalog updated Oct 21, 2026 · adm-zip: getDataAsync() bypasses the

Open the advisory

Exploitation likelihood is not on this record for CVE-2026-114103. A missing EPSS score is not a low risk. Compare adm-zip: getDataAsync() bypasses the with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (adm-zip: getDataAsync() bypasses the).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
npm adm-zip

### Summary adm-zip enforces a guard against decompression bombs on its synchronous path, but the equivalent asynchronous path does not enforce it — it accumulates and returns the entire decompressed output regardless of the entry's declared size. An application that checks an entry's declared size before deciding to process it, then reads the entry via (a completely ordinary, often-recommended choice for I/O in Node.js), gets none of the protection it believes it has. ### Details - passes to , which Node enforces. - passes the same option to but never enforces it on the streaming path — it just accumulates every chunk and allocates a final Buffer of whatever size resulted. ### PoC ### Impact An application that validates a declared size before reading an entry, then uses the async API, gets no protection against a high-ratio DEFLATE payload. Repeated or larger requests could contribute to memory exhaustion.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm adm-zip0 → 0.6.1

How to fix CVE-2026-114103

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2026-114103. A missing EPSS score is not a low risk. Compare adm-zip: getDataAsync() bypasses the with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 0.6.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-400: Uncontrolled Resource Consumption; CWE-770: Allocation of Resources Without Limits or Throttling. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 29, 2026 · GitHub Advisory Database

    Detected

    ### Summary adm-zip enforces a guard against decompression bombs on its synchronous path, but the equivalent asynchronous path does not enforce it — it accumulates and returns the entire decompressed output regardless of the entry's declared size. An application that checks an entry's declared size before deciding to process it, then reads the entry via (a completely ordinary, often-recommended ch

  2. Oct 21, 2026 · GitHub Advisory Database

    Fix available

    adm-zip fixed in 0.6.1

  3. Oct 21, 2026 · GitHub Advisory Database

    Fix available

    adm-zip fixed in 0.6.1

  4. Oct 21, 2026 · GitHub Advisory Database

    Updated

    ### Summary adm-zip enforces a guard against decompression bombs on its synchronous path, but the equivalent asynchronous path does not enforce it — it accumulates and returns the entire decompressed output regardless of the entry's declared size. An application that checks an entry's declared size before deciding to process it, then reads the entry via (a completely ordinary, often-recommended ch

Sources

References

Freshness

Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.