Buffer overflow in Imgproxy
CVE-2026-123614
imgproxy from 4.0.0 before 4.0.16 contains an integer overflow in the ICO loader that allows remote attackers to trigger a heap buffer overflow via a crafted data_size value. Attackers can submit a crafted ICO image whose data_size wraps the allocation in vips/icoload.c, corrupting heap memory to crash the process or achieve code execution.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/imgproxy/imgproxy/security/advisories/GHSA-hff9-5pqw-6w9f (vendor-advisory)
- www.vulncheck.com/advisories/imgproxy-4.0.0-before-4.0.16-heap-buffer-overflow-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123614?
- CVE-2026-123614 is a critical-severity vulnerability in Imgproxy, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-11-08.
- How severe is CVE-2026-123614?
- Critical severity. CVSS v3 base score is 9.8 out of 10.