CVE-2026-65650Network attack vector

Service interruption via unchecked avatar dimensions

Published Jul 22, 2026 · Updated Jul 22, 2026

Resource exhaustion in Elgg before 6.3.5 and 7.0.0-rc.1 allows remote authenticated users to interrupt service via avatar upload. ImageService opens uploaded avatar images for orientation correction and resizing without first bounding width, height, or total resolution. A logged-in account with avatar-upload access can force excessive memory use during image decoding or resizing, causing an out-of-memory service interruption.

CVSS severity4.3
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Elgg before 6.3.5 and 7.0.0-rc.1 allows remote authenticated users to interrupt service via avatar upload. ImageService opens uploaded avatar images for orientation correction and resizing without first bounding width, height, or total resolution. A logged-in account with avatar-upload access can force excessive memory use during image decoding or resizing, causing an out-of-memory service interruption.

The record

CVE
CVE-2026-65650
Published
Jul 22, 2026
Updated
Jul 22, 2026
Vendor
Elgg Foundation
Product
Elgg
Classifications
CWE-770, CAPEC-130, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 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 <6.3.5
  2. Affected versionversion=7.0.0-rc.1 <7.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elgg Foundation · Elggversion=0 <6.3.5; version=7.0.0-rc.1 <7.0.0

Published CVSS scores

4.3MITRECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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