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CVE-2026-80189— LeafWiki 0.10.0 through 0.12.0 Uncontrolled Resource Consumption via Unbounded ZIP Extraction

Quick assessment

Affected
perber leafwiki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Patrick Erber LeafWiki是Patrick Erber个人开发者的一款企业协作维基工具。 Patrick Erber LeafWiki 0.10.0版本至0.12.0版本存在资源管理错误漏洞，该漏洞源于internal/importer/zip_extractor.go中的ZipExtractor.ExtractToDir函数在解压ZIP压缩包时未限制写入数据量，可能允许具有Editor或Admin角色的用户导致存储或内存资源耗尽，造成拒绝服务。

CVSS 6.5 · Medium EPSS 0.55% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
perber leafwiki 0.10.0< 0.12.1 affected
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I. Basic Information for CVE-2026-80189

Vulnerability Information
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Vulnerability Title
LeafWiki 0.10.0 through 0.12.0 Uncontrolled Resource Consumption via Unbounded ZIP Extraction
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: CVE Program / CVE List V5
Vulnerability Title
Patrick Erber LeafWiki 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Patrick Erber LeafWiki是Patrick Erber个人开发者的一款企业协作维基工具。 Patrick Erber LeafWiki 0.10.0版本至0.12.0版本存在资源管理错误漏洞，该漏洞源于internal/importer/zip_extractor.go中的ZipExtractor.ExtractToDir函数在解压ZIP压缩包时未限制写入数据量，可能允许具有Editor或Admin角色的用户导致存储或内存资源耗尽，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
perber leafwiki 0.10.0 ~ 0.12.1 -

II. Public POCs for CVE-2026-80189

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III. Intelligence Information for CVE-2026-80189

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Patches & Fixes for CVE-2026-80189 (1)

Vendor Advisories for CVE-2026-80189 (2)

Vendor Pages for CVE-2026-80189 (1)

IV. Related Vulnerabilities

Same product: leafwiki
Same vendor: perber
Same weakness: CWE-409

V. Comments for CVE-2026-80189

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