adm-zip: Uncontrolled memory allocation via the declared uncompressed size (DoS)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77301
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 17:17:00 UTC
Updated2026-09-18 18:17:14 UTC
Descriptionadm-zip is a JavaScript library for creating and extracting ZIP archives in Node.js. Prior to 0.6.1, getData() in zipEntry.js trusts an entry's central-directory uncompressed size and allocates output memory before validating that value against the actual compressed data and decompression result. A small crafted ZIP can declare a multi-gigabyte uncompressed size, causing Buffer.alloc and decompression handling to commit excessive resident memory before CRC validation reports an error. Applications that read entries from untrusted archives can therefore be terminated by the operating system or suffer service-wide memory exhaustion. This issue is fixed in version 0.6.1.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.004110000 probability, percentile 0.351160000 (date 2026-09-20)

Problem Types: CWE-789 | CWE-789 CWE-789: Memory Allocation with Excessive Size Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cthackers Adm-zip affected < 0.6.1 Not specified

References

ReferenceSourceLinkTags
github.com/cthackers/adm-zip/security/advisories/GHSA-7q85-xj36-vmfc 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/cthackers/adm-zip/commit/491600683dacb6cb9fe0718a0eeb9cb5eb49... [email protected] github.com
github.com/cthackers/adm-zip/releases/tag/v0.6.1 [email protected] github.com
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