---
id: "CVE-2026-77622"
kind: "vulnerability"
aliases: ["CVE-2026-77622", "GHSA-663m-7x7m-g4fw", "GO-2026-6777"]
title: "Sliver: Unauthenticated Memory Exhaustion Denial of Service in Sliver HTTP(S) Listener PNG Decoder in github.com/bishopfox/sliver"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "github.com/bishopfox/sliver", "fixed": ["1.7.6"], "affected": "< 1.7.6", "ecosystem": "go"}]
ecosystems: ["go"]
tags: ["c2", "go", "package", "red-team", "sliver"]
not_affected_if: ["version-1.7.6-or-later"]
published_at: "2026-10-19T21:08:35+00:00"
first_seen_at: "2026-10-23T19:13:08+00:00"
updated_at: "2026-10-23T20:15:22+00:00"
sources: [{"source": "govuln", "url": "https://pkg.go.dev/vuln/GO-2026-6777", "first_seen_at": "2026-10-23T19:13:08+00:00"}]
---

# Sliver: Unauthenticated Memory Exhaustion Denial of Service in Sliver HTTP(S) Listener PNG Decoder in github.com/bishopfox/sliver

Sliver is a command-and-control framework, and its HTTP(S) listener decodes PNG data without authentication and without sufficient memory limits. An unauthenticated remote attacker can exhaust the server's memory and crash the listener.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- go:github.com/bishopfox/sliver affected < 1.7.6 fixed 1.7.6

## How to check

Check the Go module version: run 'go list -m github.com/bishopfox/sliver' in the project, or inspect the sliver server binary version.

## Fix

Upgrade github.com/bishopfox/sliver to 1.7.6 or later.

## Timeline

- 2026-10-23T19:13:08+00:00 govuln https://pkg.go.dev/vuln/GO-2026-6777

## From the sources

Sliver: Unauthenticated Memory Exhaustion Denial of Service in Sliver HTTP(S) Listener PNG Decoder in github.com/bishopfox/sliver

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_