{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-67550", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-29T18:47:17.075Z", "datePublished": "2026-07-30T19:59:55.916Z", "dateUpdated": "2026-07-31T23:07:18.352Z"}, "containers": {"cna": {"title": "re2: Out-of-bounds heap read in `exec`/`test`/`match` via attacker-influenced `lastIndex` on a non-ASCII subject \u2192 uncatchable process crash (DoS)", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/uhop/node-re2/security/advisories/GHSA-ff84-5f28-78qj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/uhop/node-re2/security/advisories/GHSA-ff84-5f28-78qj"}, {"name": "https://github.com/uhop/node-re2/commit/56293de4fc0914d7bc35f92e98de25b0d9bb417d", "tags": ["x_refsource_MISC"], "url": "https://github.com/uhop/node-re2/commit/56293de4fc0914d7bc35f92e98de25b0d9bb417d"}, {"name": "https://github.com/uhop/node-re2/releases/tag/1.25.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/uhop/node-re2/releases/tag/1.25.2"}], "affected": [{"vendor": "uhop", "product": "node-re2", "versions": [{"version": "< 1.25.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-30T19:59:55.916Z"}, "descriptions": [{"lang": "en", "value": "re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2 validates lastIndex against the UTF-8 byte length of a subject but uses it as a UTF-16 code-unit offset in exec, test, match, replace, and split, allowing an attacker-influenced lastIndex on a non-ASCII subject to trigger an out-of-bounds heap read and an uncatchable process crash, with limited heap information disclosure in some cases. This issue is fixed in 1.25.2."}], "source": {"advisory": "GHSA-ff84-5f28-78qj", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/uhop/node-re2/security/advisories/GHSA-ff84-5f28-78qj", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-31T23:06:52.923503Z", "id": "CVE-2026-67550", "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": "2026-07-31T23:07:18.352Z"}}]}}

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{"affected": [{"affectedData": [{"product": "node-re2", "vendor": "uhop", "versions": [{"status": "affected", "version": "< 1.25.2"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2 validates lastIndex against the UTF-8 byte length of a subject but uses it as a UTF-16 code-unit offset in exec, test, match, replace, and split, allowing an attacker-influenced lastIndex on a non-ASCII subject to trigger an out-of-bounds heap read and an uncatchable process crash, with limited heap information disclosure in some cases. This issue is fixed in 1.25.2."}], "id": "CVE-2026-67550", "lastModified": "2026-07-31T23:17:26.660", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.4, "impactScore": 4.2, "source": "[email protected]", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-67550", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-31T23:06:52.923503Z", "version": "2.0.3"}}]}, "published": "2026-07-30T20:18:15.030", "references": [{"source": "[email protected]", "url": "https://github.com/uhop/node-re2/commit/56293de4fc0914d7bc35f92e98de25b0d9bb417d"}, {"source": "[email protected]", "url": "https://github.com/uhop/node-re2/releases/tag/1.25.2"}, {"source": "[email protected]", "url": "https://github.com/uhop/node-re2/security/advisories/GHSA-ff84-5f28-78qj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/uhop/node-re2/security/advisories/GHSA-ff84-5f28-78qj"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "[email protected]", "type": "Secondary"}]}

{"bugzilla": {"description": "re2: Denial of Service via out-of-bounds read", "id": "2509949", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2509949"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2 validates lastIndex against the UTF-8 byte length of a subject but uses it as a UTF-16 code-unit offset in exec, test, match, replace, and split, allowing an attacker-influenced lastIndex on a non-ASCII subject to trigger an out-of-bounds heap read and an uncatchable process crash, with limited heap information disclosure in some cases. This issue is fixed in 1.25.2.", "A flaw was found in re2, a component that provides Node.js bindings for Google's RE2 regular expression engine. An attacker can exploit a vulnerability by manipulating the `lastIndex` parameter with a non-ASCII input. This manipulation can lead to an out-of-bounds heap read, causing the process to crash, which results in a Denial of Service (DoS). There is also a possibility of limited information disclosure from the heap."], "mitigation": {"lang": "en:us", "value": "Applications using the `re2` Node.js bindings should ensure that the `lastIndex` property of regular expression objects is not directly influenced by untrusted external input. As an operational control, developers should either avoid assigning `lastIndex` from untrusted input or clamp its value to the subject's string length (`str.length`) before performing regex operations on non-ASCII subjects."}, "name": "CVE-2026-67550", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "re2", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "re2", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-30T19:59:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-67550\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67550\nhttps://github.com/uhop/node-re2/commit/56293de4fc0914d7bc35f92e98de25b0d9bb417d\nhttps://github.com/uhop/node-re2/releases/tag/1.25.2\nhttps://github.com/uhop/node-re2/security/advisories/GHSA-ff84-5f28-78qj"], "statement": "This flaw primarily impacts Availability with low Confidentiality impact and zero effect on Integrity (C:L, I:N, A:H). Exploitation requires an attacker to manipulate the `lastIndex` property prior to executing regular expression operations on non-ASCII input, causing a mismatch between UTF-8 byte validation and UTF-16 code-unit offsets. Practically, this leads to an uncatchable process crash (Denial of Service) via an out-of-bounds heap read, though minor heap memory exposure is theoretically possible. High Attack Complexity (AC:H) is assessed because the targeted Node.js application must explicitly maintain and expose stateful regex objects with attacker-controlled `lastIndex` properties across non-ASCII strings. Applications using stateless regex execution or not accepting external input into `lastIndex` are unaffected.", "threat_severity": "Moderate"}

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