CVE-2026-23956

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23956", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-19T14:49:06.312Z", "datePublished": "2026-01-22T01:23:58.922Z", "dateUpdated": "2026-05-20T00:53:15.264Z"}, "containers": {"cna": {"title": "seroval affected by Denial of Service via RegExp serialization", "problemTypes": [{"descriptions": [{"cweId": "CWE-1333", "lang": "en", "description": "CWE-1333: Inefficient Regular Expression Complexity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr"}, {"name": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060", "tags": ["x_refsource_MISC"], "url": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060"}, {"name": "https://github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts#L90", "tags": ["x_refsource_MISC"], "url": "https://github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts#L90"}], "affected": [{"vendor": "lxsmnsyc", "product": "seroval", "versions": [{"version": ">= 0.2.0, < 1.4.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-20T00:53:15.264Z"}, "descriptions": [{"lang": "en", "value": "seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1."}], "source": {"advisory": "GHSA-hx9m-jf43-8ffr", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-22T19:14:20.303739Z", "id": "CVE-2026-23956", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-01-22T19:15:50.759Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-23956", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-22T19:14:20.303739Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-22T19:14:51.927Z"}}], "cna": {"title": "seroval affected by Denial of Service via RegExp serialization", "source": {"advisory": "GHSA-hx9m-jf43-8ffr", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "lxsmnsyc", "product": "seroval", "versions": [{"status": "affected", "version": ">= 0.2.0, < 1.4.1"}]}], "references": [{"url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr", "name": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060", "name": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts#L90", "name": "https://github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts#L90", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1333", "description": "CWE-1333: Inefficient Regular Expression Complexity"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-20T00:53:15.264Z"}}}, "cveMetadata": {"cveId": "CVE-2026-23956", "state": "PUBLISHED", "dateUpdated": "2026-05-20T00:53:15.264Z", "dateReserved": "2026-01-19T14:49:06.312Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-01-22T01:23:58.922Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "seroval", "vendor": "lxsmnsyc", "versions": [{"status": "affected", "version": ">= 0.2.0, < 1.4.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:lxsmnsyc:seroval:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "85760E40-9AB1-40EB-98A1-D1A4411AAFC5", "versionEndExcluding": "1.4.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1."}, {"lang": "es", "value": "seroval facilita la serializaci\u00f3n de valores JS, incluyendo estructuras complejas que van m\u00e1s all\u00e1 de las capacidades de JSON.stringify. En las versiones 1.4.0 y anteriores, la anulaci\u00f3n de la serializaci\u00f3n de RegExp con patrones extremadamente grandes puede agotar la memoria en tiempo de ejecuci\u00f3n de JavaScript durante la deserializaci\u00f3n. Adem\u00e1s, la anulaci\u00f3n de la serializaci\u00f3n de RegExp con patrones que desencadenan un retroceso catastr\u00f3fico puede conducir a ReDoS (Denegaci\u00f3n de Servicio por Expresiones Regulares). Este problema ha sido solucionado en la versi\u00f3n 1.4.1."}], "id": "CVE-2026-23956", "lastModified": "2026-06-17T10:22:20.970", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23956", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-22T19:14:20.303739Z", "version": "2.0.3"}}]}, "published": "2026-01-22T02:15:52.310", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts#L90"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1333"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "seroval: Seroval: Denial of Service via malicious regular expressions during deserialization", "id": "2431917", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2431917"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1333", "details": ["A flaw was found in seroval, a JavaScript (JS) value stringification library. A remote attacker could exploit this vulnerability by providing specially crafted regular expressions during deserialization. This could lead to the exhaustion of JavaScript runtime memory or trigger a Regular Expression Denial of Service (ReDoS), making the application unavailable to legitimate users."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-23956", "public_date": "2026-01-22T01:23:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23956\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23956\nhttps://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060\nhttps://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr"], "statement": "This vulnerability is rated Important for Red Hat as it can lead to a Denial of Service in applications utilizing the `seroval` library. Specifically, versions 1.4.0 and below are susceptible to memory exhaustion or Regular Expression Denial of Service (ReDoS) when processing maliciously crafted serialized regular expressions. This affects community projects such as Forgejo in Fedora and EPEL.", "threat_severity": "Important"}

{"created": "2026-01-22T10:08:16.562248+00:00", "updated": "2026-05-20T03:00:12.987989+00:00", "vendors": ["lxsmnsyc", "lxsmnsyc$PRODUCT$seroval"]}