CVE-2026-80189LeafWiki 0.10.0 through 0.12.0 Uncontrolled Resource Consumption via Unbounded ZIP Extraction
Updated under an hour ago ()
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It affects perber leafwiki. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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LeafWiki extracts an uploaded ZIP archive without limiting how much data it will write. ZipExtractor.ExtractToDir in internal/importer/zip_extractor.go opens each entry and copies it to the destination with io.Copy, which runs to the end of the decompressed stream, so only the size of the uploaded archive is bounded and the size it expands to is not. The import route that reaches this code requires the Editor or Admin role, and the upload itself is capped at 500 MiB compressed. Because a ZIP entry can compress at a very high ratio, an archive well inside that cap can expand to hundreds of gigabytes as it is written out. The extraction directory defaults to a location under the operating system temporary directory, so the written data consumes the disk backing that path, which on a tmpfs-backed temporary directory is memory. A user holding the Editor role can therefore exhaust the storage the service depends on and keep it from serving, using far more resource than the upload limit alone would permit.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-409
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Aug 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
perber leafwiki perber:leafwiki (from the name) | from 0.10.0 before 0.12.1 | CNA record |
References
- https://github.com/perber/leafwikiproduct
- https://github.com/perber/leafwiki/security/advisories/GHSA-258m-crqp-25xcvendor-advisory
- https://github.com/perber/leafwiki/blob/v0.12.0/internal/importer/zip_extractor.gotechnical-description
- https://github.com/perber/leafwiki/releases/tag/v0.12.1release-notes
- https://www.vulncheck.com/advisories/leafwiki-0.10.0-through-0.12.0-uncontrolled-resource-consumption-via-unbounded-zip-extractionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.