Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The adm-zip npm package, versions before 0.6.1, has a gap in its decompression-bomb protection: the synchronous getData() path enforces a maxOutputLength limit, but the asynchronous getDataAsync() path does not, so it returns the full decompressed output regardless of the entry's declared size. The source does not say what an attacker must do beyond supplying a crafted archive, but an application that relies on the size check and then reads entries with getDataAsync() could have memory exhausted by a high-compression-ratio payload. The fix is to upgrade adm-zip to version 0.6.1 or later.
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
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.9 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0040, the 35th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:33 UTC First seen by agentprime
- 31 Oct 2026, 13:33 UTC Confirmed by OSV