CVE-2026-65650

MEDIUM

Elgg - Allocation of Resources Without Limits or Throttling

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-65650. PoCs published by swornim619.

AI-analyzed exploit summary This PoC demonstrates an authenticated denial-of-service (DoS) vulnerability in Elgg's avatar upload feature by generating a PNG image with extreme dimensions (10,000x10,000 pixels), forcing PHP's GD library to allocate excessive memory (~572 MB) during processing, leading to potential OOM kills of PHP-FPM workers.

Description

Elgg before 7.0.0 does not check image dimensions to prevent denial of service via a large avatar upload.

Exploits (1)

github WORKING POC
by swornim619 · poc
https://github.com/swornim619/CVE-2026-65650

This PoC demonstrates an authenticated denial-of-service (DoS) vulnerability in Elgg's avatar upload feature by generating a PNG image with extreme dimensions (10,000x10,000 pixels), forcing PHP's GD library to allocate excessive memory (~572 MB) during processing, leading to potential OOM kills of PHP-FPM workers.

Classification
Working Poc 98%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Elgg < 7.0.0, < 6.3.5
Auth required
Prerequisites: Authenticated user access to Elgg · Ability to upload avatar images
mistral-large-3 · analyzed Jul 24, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 4.3
EPSS 0.0039
EPSS Percentile 31.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (2)
Elgg/Elgg < 6.3.5
Elgg/Elgg 7.0.0-rc.1 - 7.0.0
Published Jul 22, 2026
Tracked Since Jul 22, 2026