CVE-2026-123616

imgproxy 3.3.0 before 4.0.16 Memory Exhaustion DoS via ICO Loader

Published Nov 8, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
imgproxy from 3.3.0 before 4.0.16 contains an unbounded memory allocation vulnerability in the ICO loader that fails to validate the data_size field. Attackers can supply a crafted 23-byte ICO file declaring a ~4GB data_size to trigger memory exhaustion and worker crashes without authentication.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Imgproxy
Imgproxy imgproxy
Vendors & Products Imgproxy
Imgproxy imgproxy
Type Values Removed Values Added
Description imgproxy from 3.3.0 before 4.0.16 contains an unbounded memory allocation vulnerability in the ICO loader that fails to validate the data_size field. Attackers can supply a crafted 23-byte ICO file declaring a ~4GB data_size to trigger memory exhaustion and worker crashes without authentication.
Title imgproxy 3.3.0 before 4.0.16 Memory Exhaustion DoS via ICO Loader
First Time appeared Evilmartians
Evilmartians imgproxy
Weaknesses CWE-789
CPEs cpe:2.3:a:evilmartians:imgproxy:*:*:*:*:*:*:*:*
Vendors & Products Evilmartians
Evilmartians imgproxy
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 12, 2026, 5:52 PM
Reserved
Nov 6, 2026, 1:04 AM
Status
Awaiting Analysis
Published
Nov 8, 2026, 2:16 AM
Modified
Nov 12, 2026, 8:28 PM