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Advisory record · GHSA-rcw4-f5rp-g42v

adm-zip: Decompression-bomb protection (fix for CVE-2026-39244) can be bypassed by declaring uncompressed size as 0

CVSS 8.7 HighEPSS 0.0068 · 52nd percentile

Published by the GitHub Advisory Database at 29 Sept 2026, 18:25 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
adm-zipnpm<0.6.10.6.1
Identifiers
GHSA-rcw4-f5rp-g42v · CVE-2026-92000
Weakness (CWE)
CWE-409
Tags
Published
29 Sept 2026
Updated
29 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-rcw4-f5rp-g42v affects the npm package adm-zip before version 0.6.1, and the fix is in 0.6.1. An attacker who can supply a crafted ZIP file to an application that reads or extracts it can set an entry's declared uncompressed size to 0, which bypasses the decompression-size limit added for CVE-2026-39244 and can drive memory use far beyond the intended cap, risking a crash. Upgrade adm-zip to version 0.6.1 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0068, the 52nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:34 UTC First seen by agentprime
  2. 31 Oct 2026, 13:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.