CVE-2026-9277

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-9277", "assignerOrgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "state": "PUBLISHED", "assignerShortName": "harborist", "dateReserved": "2026-05-22T12:13:25.893Z", "datePublished": "2026-05-22T13:22:38.873Z", "dateUpdated": "2026-09-14T12:04:27.683Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "shortName": "harborist", "dateUpdated": "2026-05-22T13:22:38.873Z"}, "title": "shell-quote `quote()` does not validate object-token shapes, allowing command injection via line terminators in `.op`", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-78", "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-77", "description": "CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')", "type": "CWE"}]}], "affected": [{"product": "shell-quote", "collectionURL": "https://www.npmjs.com/package/shell-quote", "packageName": "shell-quote", "repo": "https://github.com/ljharb/shell-quote", "programFiles": ["quote.js"], "versions": [{"status": "affected", "version": "1.1.0", "lessThan": "1.8.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.</p>"}]}], "references": [{"url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p", "name": "GHSA-w7jw-789q-3m8p", "tags": ["vendor-advisory"]}, {"url": "https://github.com/ljharb/shell-quote/commit/1518179", "name": "Fix commit", "tags": ["patch"]}, {"url": "https://github.com/ljharb/shell-quote", "tags": ["product"]}, {"url": "https://www.npmjs.com/package/shell-quote", "tags": ["product"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "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": "CRITICAL", "baseScore": 9.2, "vectorString": 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The quote() function did not properly validate object-token inputs, allowing line terminators to pass unescaped into the output. A remote attacker could exploit this vulnerability by providing specially crafted input, which a POSIX shell would interpret as a command separator. This could lead to command injection, enabling the attacker to execute arbitrary code on the system."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-78", "description": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}], "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-09-14T12:04:27.683Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-9277", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-05-22T14:17:31.964845Z"}}}], "references": [{"url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-22T14:17:25.193Z"}}], "cna": {"title": "shell-quote `quote()` does not validate object-token shapes, allowing command injection via line terminators in `.op`", "source": {"advisory": "GHSA-w7jw-789q-3m8p", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Akshat Sinha (@akshatgit)"}, {"lang": "en", "type": "remediation developer", "value": "Jordan Harband (@ljharb)"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/ljharb/shell-quote", "product": "shell-quote", "versions": [{"status": "affected", "version": "1.1.0", "lessThan": "1.8.4", "versionType": "semver"}], "packageName": "shell-quote", "programFiles": ["quote.js"], "collectionURL": "https://www.npmjs.com/package/shell-quote", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p", "name": "GHSA-w7jw-789q-3m8p", "tags": ["vendor-advisory"]}, {"url": "https://github.com/ljharb/shell-quote/commit/1518179", "name": "Fix commit", "tags": ["patch"]}, {"url": "https://github.com/ljharb/shell-quote", "tags": ["product"]}, {"url": "https://www.npmjs.com/package/shell-quote", "tags": ["product"]}], "descriptions": [{"lang": "en", "value": "shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.", "supportingMedia": [{"type": "text/html", "value": "<p>shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-78", "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-77", "description": "CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')"}]}], "providerMetadata": {"orgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "shortName": "harborist", "dateUpdated": "2026-05-22T13:22:38.873Z"}}}, "cveMetadata": {"cveId": "CVE-2026-9277", "state": "PUBLISHED", "dateUpdated": "2026-09-14T12:04:27.683Z", "dateReserved": "2026-05-22T12:13:25.893Z", "assignerOrgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "datePublished": "2026-05-22T13:22:38.873Z", "assignerShortName": "harborist"}, "dataVersion": "5.2"}

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{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:container_native_virtualization:4"], "defaultStatus": "affected", "packageName": "container-native-virtualization/kubevirt-console-plugin-rhel9", "product": "Red Hat OpenShift Virtualization 4", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:trusted_artifact_signer:1"], "defaultStatus": "unaffected", "packageName": "rhtas/rekor-search-ui-rhel9", "product": "Red Hat Trusted Artifact Signer", "vendor": "Red Hat"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`."}, {"lang": "es", "value": "La funci\u00f3n 'quote()' de shell-quote no validaba las entradas de token de objeto contra el modelo de operador utilizado por 'parse()'. El campo '.op' se escapaba con barra invertida car\u00e1cter por car\u00e1cter usando '/(.)/g', lo que en JavaScript no coincide con los terminadores de l\u00ednea ('\\n', '\\r', 'U+2028', 'U+2029'). Un terminador de l\u00ednea en '.op' por lo tanto pasaba sin escapar a la salida; los shells POSIX tratan un salto de l\u00ednea literal como un separador de comandos, por lo que cualquier contenido despu\u00e9s de \u00e9l se ejecutar\u00eda como un segundo comando. La ruta de c\u00f3digo vulnerable es alcanzable de dos maneras: (1) construcci\u00f3n directa de '{ op: '...\\n...' }' desde entrada externa, y (2) a trav\u00e9s de 'parse(cmd, envFn)' cuando 'envFn' devuelve tokens de objeto cuyo '.op' est\u00e1 influenciado por el atacante. Ambas son superficies de API documentadas. Solucionado reemplazando el escape por car\u00e1cter con validaci\u00f3n estricta de forma: '.op' debe coincidir con la lista de permitidos de operadores de control del analizador; '{ op: 'glob', pattern }' valida 'pattern' y proh\u00edbe los terminadores de l\u00ednea; '{ comment }' valida 'comment' y proh\u00edbe los terminadores de l\u00ednea; cualquier otra forma de objeto lanza 'TypeError'."}], "id": "CVE-2026-9277", "lastModified": "2026-09-14T13:19:33.133", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.2, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": 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