{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-29870", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-03-31T15:08:04.780Z", "dateReserved": "2026-03-04T00:00:00.000Z", "datePublished": "2026-03-31T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-03-31T14:36:17.274Z"}, "descriptions": [{"lang": "en", "value": "A directory traversal vulnerability in the agentic-context-engine project versions up to 0.7.1 allows arbitrary file writes via the checkpoint_dir parameter in OfflineACE.run. The save_to_file method in ace/skillbook.py fails to normalize or validate filesystem paths, allowing traversal sequences to escape the intended checkpoint directory. This vulnerability allows attackers to overwrite arbitrary files accessible to the application process, potentially leading to application corruption, privilege escalation, or code execution depending on the deployment context."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/lilmingwa13/security-research/blob/main/CVE-2026-29870.md"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-22", "lang": "en", "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-31T15:06:38.268919Z", "id": "CVE-2026-29870", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-31T15:08:04.780Z"}}]}, "dataVersion": "5.2"}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "A directory traversal vulnerability in the agentic-context-engine project versions up to 0.7.1 allows arbitrary file writes via the checkpoint_dir parameter in OfflineACE.run. The save_to_file method in ace/skillbook.py fails to normalize or validate filesystem paths, allowing traversal sequences to escape the intended checkpoint directory. This vulnerability allows attackers to overwrite arbitrary files accessible to the application process, potentially leading to application corruption, privilege escalation, or code execution depending on the deployment context."}], "id": "CVE-2026-29870", "lastModified": "2026-04-01T14:24:02.583", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.7, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-31T15:16:12.733", "references": [{"source": "cve@mitre.org", "url": "https://github.com/lilmingwa13/security-research/blob/main/CVE-2026-29870.md"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.7.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "agentic-context-engine", "vendor": "kayba-ai"}], "analysis": {"en": {"generated_at": "2026-03-31T16:25:05.099393+00:00", "value": {"mitigation_remediation": ["Upgrade agentic-context-engine to version 0.7.2 or later.", "If an upgrade is unavailable, constrain the checkpoint_dir parameter to a predetermined safe directory and perform strict path validation before writing files.", "Apply filesystem permissions or ACLs to prevent the application process from writing to critical system files.", "Monitor logs for unexpected file modifications or failed write operations, and review the application for unexpected code execution.", "Consider deploying the service within a restricted container or sandbox to limit the impact of a potential exploitation."], "summary": {"action": "Patch ASAP", "impact": "Arbitrary file write leading to possible code execution"}, "threat_synthesis": {"affected_systems": "The vulnerable component is the agentic-context-engine project, versions up to 0.7.1. The exact vendor is unspecified but the source code is available for versions 0.0.x through 0.7.1, which may be deployed in various self\u2011hosted or cloud environments.", "description_and_impact": "This flaw allows an attacker to inject a traversal sequence into the checkpoint_dir parameter of the OfflineACE.run function. The underlying save_to_file method does not normalise or validate the supplied path, enabling writes outside the intended directory. This can result in overwriting critical configuration files or binaries, potentially allowing the attacker to corrupt the application or inject malicious code.", "risk_and_exploitability": "With a CVSS score of 7.6, the issue is considered high severity, and the EPSS score is not reported. The vulnerability is not listed in the CISA KEV catalog, suggesting no public exploit is documented yet. Based on the description, the likely attack vector requires the attacker to interact with the OfflineACE.run entry point, indicating either a local or remote vulnerability depending on deployment. Successful exploitation can grant the attacker arbitrary file writes, leading to privilege escalation, application corruption, or code execution based on the target environment."}}}}, "created": "2026-03-31T19:56:57.211370+00:00", "title": "Agentic Context Engine Arbitrary File Write via Directory Traversal", "updated": "2026-04-03T09:11:03.686510+00:00", "vendors": ["kayba-ai", "kayba-ai$PRODUCT$agentic-context-engine"]}