{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-124028", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-06T18:51:27.537Z", "datePublished": "2026-11-06T19:14:45.628Z", "dateUpdated": "2026-11-06T19:14:45.628Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-06T19:14:45.628Z"}, "datePublic": "2026-09-25T00:00:00.000Z", "title": "mistral.rs before 0.9.5 Tool Call Injection via mistralrs-core Output Parsers", "descriptions": [{"lang": "en", "value": "mistral.rs before 0.9.5 contains a delimiter injection vulnerability in mistralrs-core that allows attackers to inject tool calls by placing delimiter strings in text the model quotes. Attackers controlling documents, web pages or tool outputs can embed tags like </tool_call> to make qwen-xml, gemma4 or reasoning parsers return extra calls to declared tools with attacker-chosen arguments."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Delimiters", "cweId": "CWE-140", "type": "CWE"}]}], "affected": [{"vendor": "EricLBuehler", "product": "mistral.rs", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "0.9.5"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 2.3, "baseSeverity": "LOW"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 4.2, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/EricLBuehler/mistral.rs/commit/b43d3443e946752c0f662c2df42a2974410c9532", "tags": ["patch"], "name": "Patch Commit"}, {"url": "https://github.com/EricLBuehler/mistral.rs", "tags": ["product"]}, {"url": "https://github.com/EricLBuehler/mistral.rs/security/advisories/GHSA-34w8-j94f-8c5w", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-34w8-j94f-8c5w)"}, {"url": "https://github.com/EricLBuehler/mistral.rs/pull/2455", "tags": ["issue-tracking", "patch"]}, {"url": "https://github.com/EricLBuehler/mistral.rs/releases/tag/v0.9.5", "tags": ["release-notes"], "name": "mistral.rs v0.9.5 Release Notes"}, {"name": "VulnCheck Advisory: mistral.rs before 0.9.5 Tool Call Injection via mistralrs-core Output Parsers", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/mistral-rs-before-0.9.5-tool-call-injection-via-mistralrs-core-output-parsers"}], "credits": [{"lang": "en", "value": "Taehun Kim", "type": "finder"}, {"lang": "en", "value": "Youngjoo Shin", "type": "finder"}, {"lang": "en", "value": "Eric Buehler", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.9.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "mistral.rs", "source": "cna", "vendor": "EricLBuehler"}, "product": "mistral.rs", "vendor": "ericlbuehler"}], "created": "2026-11-06T20:45:07.132550+00:00", "updated": "2026-11-06T20:45:07.547707+00:00", "vendors": ["ericlbuehler", "ericlbuehler$PRODUCT$mistral.rs"]}