{"id":"CVE-2026-77157","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77157","generatedAt":"2026-10-28T00:18:42.405Z","title":"Prior to the fix, the downloaded archive was not verified against a checksum before extraction and execution.","description":"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\".\n\n\n\nPrior 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.\n\n\n\nSuccessful 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.\n\n\n\nThe download is now verified against a published SHA-256 checksum before extraction.","published":"2026-10-22T18:17:30.000Z","lastModified":"2026-10-23T19:57:43.000Z","status":"Deferred","sourceIdentifier":"596c5446-0ce5-4ba2-aa66-48b3b757a647","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-353"],"affected":[],"epss":{"score":0.00143,"percentile":0.03556,"date":"2026-10-26","history":[{"date":"2026-10-23","score":0.00143,"percentile":0.03265}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-22T18:17:30.000Z","detail":{"score":"6.3","severity":"MEDIUM","publishedAt":"2026-10-22T18:17:29.630Z"},"summary":"New CVE, medium severity (CVSS 6.3)."}],"references":[{"url":"https://github.com/Checkmarx/ast-cli","source":"596c5446-0ce5-4ba2-aa66-48b3b757a647"},{"url":"https://github.com/Checkmarx/ast-cli/security/advisories/GHSA-vf6p-x2fw-5hcg","source":"596c5446-0ce5-4ba2-aa66-48b3b757a647"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77157","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}