---
id: CVE-2026-77157
title: >-
  ast-cli: Auto-update downloads are not verified against a checksum before
  execution
summary: >-
  ast-cli downloads two helper binaries, the Vorpal ASCA real-time engine and
  the SCA Resolver, from "download.checkmarx.com" as part of its auto-update
  flow, triggered by the Checkmarx’s "VSCode/JetBrains" extensions and by cx
  scan "sca-r…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-353
vendor: Checkmarx
product: github.com/checkmarx/ast-cli
affected:
  - github.com/checkmarx/ast-cli <= 2.3.59
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T17:50:51.933Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-77157'
references:
  - url: 'https://github.com/Checkmarx/ast-cli'
  - url: >-
      https://github.com/Checkmarx/ast-cli/security/advisories/GHSA-vf6p-x2fw-5hcg
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.360Z'
---

## Overview

ast-cli downloads two helper binaries, the Vorpal ASCA real-time engine and the SCA Resolver, from "download.checkmarx.com" as part of its auto-update flow, triggered by the Checkmarx’s "VSCode/JetBrains" extensions and by cx scan "sca-realtime".



Prior to the fix, the downloaded archive was not verified against a checksum before extraction and execution. An attacker able to substitute the served archive could deliver an arbitrary binary that ast-cli would extract and execute the contents of the archive, since no integrity check was performed on the download.



Successful exploitation requires compromising "download.checkmarx.com" and replacing the served archive with one containing an attacker-controlled binary. If the served archive had been replaced that way, any developer machine or CI pipeline invoking ASCA (via Checkmarx's VSCode/JetBrains extensions) or cx scan "sca-realtime" on an affected version would have extracted and executed that binary in place of the intended download.



The download is now verified against a published SHA-256 checksum before extraction.

## Affected

- `github.com/checkmarx/ast-cli <= 2.3.59`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.