CVE-2026-123616 imgproxy 3.3.0 before 4.0.16 Memory Exhaustion DoS via ICO Loader
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-123616?
CVE-2026-123616 is a high-severity vulnerability in imgproxy, published on 8 Nov 2026.
Official 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.
Weakness: CWE-789
Which versions are affected by CVE-2026-123616?
5 open source packages ship an affected version, including github.com/imgproxy/imgproxy/v3, github.com/imgproxy/imgproxy and github.com/imgproxy/imgproxy/v2.
| Package | Affected | Fixed in |
|---|---|---|
github.com/imgproxy/imgproxy/v3 Go | From 3.3.0 | None |
github.com/imgproxy/imgproxy/v3 Go | From 3.3.0 | 4.0.16 |
github.com/imgproxy/imgproxy Go | All versions | None |
github.com/imgproxy/imgproxy/v2 Go | All versions | None |
github.com/imgproxy/imgproxy/v4 Go | All versions | 4.0.16 |
How do I fix CVE-2026-123616?
Upgrade github.com/imgproxy/imgproxy/v3 to 4.0.16 or later.
Is CVE-2026-123616 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-123616 exists.
Sources
Also known as GHSA-97wv-7mx5-f6w4, GHSA-mmq5-xm89-9pfg, GO-2026-6898.