GHSA-494m-4556-wf5p: github.com/imgproxy/imgproxy/v3

imgproxy has out-of-bounds heap read/write in ICO loader BMP header reconstruction that allows unauthenticated remote worker crash

CVSS 7.5 High

Published by the GitHub Advisory Database at 30 Oct 2026, 22:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/imgproxy/imgproxy/v3	Go	>=3.3.0, <4.0.17	4.0.17

Identifiers

GHSA-494m-4556-wf5p · GO-2026-6895

Weakness (CWE)

CWE-125 · CWE-787

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Affected: the Go package github.com/imgproxy/imgproxy/v3, versions 3.3.0 up to 4.0.17 (fixed in 4.0.17). An out-of-bounds heap write in the ICO image loader lets an attacker who supplies a crafted ICO image crash the imgproxy worker process, causing denial of service. Upgrade to version 4.0.17 or later; the source lists no workaround.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub Advisory Database

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 14:11 UTC First seen by agentprime
31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.