# CVE-2026-123614: imgproxy 4.0.0 before 4.0.16 Heap Buffer Overflow via ICO Loader Integer Overflow

Status: published. Published: 2026-11-08. Updated: 2026-11-08.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- imgproxy / imgproxy (github.com/imgproxy/imgproxy/v4): ≥ 4.0.0; < 4.0.16 (affected, semver); 4.0.16 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 9.3 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-122

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/imgproxy/imgproxy/security/advisories/GHSA-hff9-5pqw-6w9f (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/imgproxy-4.0.0-before-4.0.16-heap-buffer-overflow-via-ico-loader-integer-overflow (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-123614; retrieved 2026-11-08; source updated 2026-11-08

Revision: 0d64cab54bdb078a1b1080d6a18319379a66a50ea3b05dcb85fe02330dd53c25

Canonical: https://y2.dev/cve/CVE-2026-123614

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- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

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