CVE-2026-80189Network attack vector

Service interruption via unbounded ZIP extraction

Published Aug 25, 2026 · Updated Aug 25, 2026

Uncontrolled resource consumption in LeafWiki 0.10.0 through 0.12.0 allows remote authenticated users to interrupt service via ZIP import. ZipExtractor.ExtractToDir copies each decompressed entry to temporary storage with io.Copy without enforcing per-entry or total output limits. Editor or Admin access is required, and an archive below the 500 MiB upload cap can exhaust the disk or tmpfs backing the temporary directory.

CVSS severity7.1
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in LeafWiki 0.10.0 through 0.12.0 allows remote authenticated users to interrupt service via ZIP import. ZipExtractor.ExtractToDir copies each decompressed entry to temporary storage with io.Copy without enforcing per-entry or total output limits. Editor or Admin access is required, and an archive below the 500 MiB upload cap can exhaust the disk or tmpfs backing the temporary directory.

The record

CVE
CVE-2026-80189
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Patrick Erber
Product
LeafWiki
Classifications
CWE-409, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.10.0 <0.12.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Patrick Erber · LeafWikiversion=0.10.0 <0.12.1

Published CVSS scores

7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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