CVE-2026-61690Public exploitNetwork attack vector

Service interruption via unrestricted ZIP extraction

Published Aug 19, 2026 · Updated Aug 25, 2026

Denial of service in GetGrav Grav before 2.0.1 allows remote authenticated users to exhaust server storage via a crafted ZIP archive. ZipArchiver::extract() passes every entry to ZipArchive::extractTo() without first enforcing configured limits on expanded size, file count, or nesting depth. Reachability requires a plugin or custom code path that supplies attacker-controlled ZIP data through the Archiver factory; first-party Grav code does not call this path.

CVSS severity6.5
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in GetGrav Grav before 2.0.1 allows remote authenticated users to exhaust server storage via a crafted ZIP archive. ZipArchiver::extract() passes every entry to ZipArchive::extractTo() without first enforcing configured limits on expanded size, file count, or nesting depth. Reachability requires a plugin or custom code path that supplies attacker-controlled ZIP data through the Archiver factory; first-party Grav code does not call this path.

The record

CVE
CVE-2026-61690
Published
Aug 19, 2026
Updated
Aug 25, 2026
Vendor
GetGrav
Product
Grav
Classifications
CWE-409, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 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=< 2.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GetGrav · Gravversion=< 2.0.1

Published CVSS scores

6.5GitHubCVSS: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 exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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