Vulnerability in Imgproxy
CVE-2026-123616
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.
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-mmq5-xm89-9pfg (vendor-advisory)
- www.vulncheck.com/advisories/imgproxy-3.3.0-before-4.0.16-memory-exhaustion-dos… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123616?
- CVE-2026-123616 is a high-severity vulnerability in Imgproxy, classified under CWE-789. CVSS score: 7.5/10. Published 2026-11-08.
- How severe is CVE-2026-123616?
- High severity. CVSS v3 base score is 7.5 out of 10.