Elgg before 7.0.0 does not check image dimensions to prevent denial of service via a large avatar upload. (CVE-2026-65650)
Elgg versions prior to 7.0.0 do not validate image dimensions when users upload avatars, which can lead to denial of service conditions by processing excessively large images.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-65650 affects Elgg before version 7.0.0. It arises because the software does not check the dimensions of uploaded avatar images, allowing attackers to upload very large images. This can cause resource exhaustion resulting in a denial of service (DoS). The CVSS 3.1 vector indicates the attack requires network access with low complexity and low privileges, no user interaction, and impacts availability only, with no confidentiality or integrity impact.
Potential Impact
An attacker with low privileges can cause a denial of service by uploading a large avatar image, potentially exhausting server resources and disrupting service availability. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider implementing manual or external validation of avatar image dimensions to prevent excessively large uploads.
Elgg before 7.0.0 does not check image dimensions to prevent denial of service via a large avatar upload. (CVE-2026-65650)
Description
Elgg versions prior to 7.0.0 do not validate image dimensions when users upload avatars, which can lead to denial of service conditions by processing excessively large images.
CVSS v3.1
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-65650 affects Elgg before version 7.0.0. It arises because the software does not check the dimensions of uploaded avatar images, allowing attackers to upload very large images. This can cause resource exhaustion resulting in a denial of service (DoS). The CVSS 3.1 vector indicates the attack requires network access with low complexity and low privileges, no user interaction, and impacts availability only, with no confidentiality or integrity impact.
Potential Impact
An attacker with low privileges can cause a denial of service by uploading a large avatar image, potentially exhausting server resources and disrupting service availability. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider implementing manual or external validation of avatar image dimensions to prevent excessively large uploads.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-7983-35fr-8qwm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-65650"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a6151239c2644c7f8da6252
Added to database: 07/22/2026, 23:24:19 UTC
Last enriched: 07/22/2026, 23:57:19 UTC
Last updated: 07/23/2026, 00:32:07 UTC
Views: 2
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