CVE-2026-77157

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An attacker able to substitute the served archive could deliver an arbitrary binary that ast-cli would extract\u00a0and execute the contents of the archive, since no integrity check was performed on\u00a0the 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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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\u2019s \"VSCode/JetBrains\" extensions and by cx scan \"sca-realtime\".</p><p>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&nbsp;<span>and execute the contents of the archive, since no integrity check was performed on&nbsp;</span><span>the download.</span></p><p>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.<span></span></p><p>The download is now verified against a published SHA-256 checksum before extraction.</p>"}]}], "references": [{"url": "https://github.com/Checkmarx/ast-cli", "tags": ["product"]}, {"url": "https://github.com/Checkmarx/ast-cli/security/advisories/GHSA-vf6p-x2fw-5hcg", "tags": ["third-party-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 6.4, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.3, "vectorString": "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"}}], "credits": [{"lang": "en", "value": "Seb\u00e1stian Alba | @Sebasteuo", "type": "finder"}], "source": {"advisory": "GHSA-vf6p-x2fw-5hcg", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-02T12:07:44.661308Z", "id": "CVE-2026-77157", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-02T12:08:17.642Z"}}]}}

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An attacker able to substitute the served archive could deliver an arbitrary binary that ast-cli would extract\u00a0and execute the contents of the archive, since no integrity check was performed on\u00a0the 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.", "supportingMedia": [{"type": "text/html", "value": "<p>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\u2019s \"VSCode/JetBrains\" extensions and by cx scan \"sca-realtime\".</p><p>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&nbsp;<span>and execute the contents of the archive, since no integrity check was performed on&nbsp;</span><span>the download.</span></p><p>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.<span></span></p><p>The download is now verified against a published SHA-256 checksum before extraction.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-353", "description": "CWE-353 Missing support for integrity check"}]}], "providerMetadata": {"orgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "shortName": "Checkmarx", "dateUpdated": "2026-10-22T17:50:51.933Z"}}}, "cveMetadata": {"cveId": "CVE-2026-77157", "state": "PUBLISHED", "dateUpdated": "2026-11-02T12:08:17.642Z", "dateReserved": "2026-08-20T14:34:06.113Z", "assignerOrgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "datePublished": "2026-10-22T17:50:51.933Z", "assignerShortName": "Checkmarx"}, "dataVersion": "5.2"}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.3.59]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "2.3.60"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "github.com/checkmarx/ast-cli", "source": "cna", "vendor": "Checkmarx"}, "product": "ast-cli", "vendor": "checkmarx"}], "created": "2026-10-22T19:30:09.706030+00:00", "updated": "2026-10-26T19:26:08.832663+00:00", "vendors": ["checkmarx", "checkmarx$PRODUCT$ast-cli"]}