{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-110257", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-13T18:33:55.549Z", "datePublished": "2026-10-14T14:16:30.933Z", "dateUpdated": "2026-10-14T15:55:22.107Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-14T14:16:30.933Z"}, "datePublic": "2026-08-13T00:00:00.000Z", "title": "OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute", "descriptions": [{"lang": "en", "value": "OW2 ASM 5.0 before 9.11 contains an excessive memory allocation vulnerability in ClassReader.readBootstrapMethodsAttribute() that sizes an int array from num_bootstrap_methods without validating attribute_length. Attackers can supply a crafted class file of about 100 bytes that forces roughly 2 GB allocation, causing an OutOfMemoryError that crashes the JVM or consuming thread."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Memory Allocation with Excessive Size Value", "cweId": "CWE-789", "type": "CWE"}]}], "affected": [{"vendor": "OW2", "product": "ASM", "defaultStatus": "unaffected", "versions": [{"version": "5.0", "lessThan": "9.11", "status": "affected", "versionType": "custom"}], "packageURL": "pkg:maven/org.ow2.asm/asm", "collectionURL": "https://repo1.maven.org/maven2/", "repo": "https://gitlab.ow2.org/asm/asm"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://gitlab.ow2.org/asm/asm/-/merge_requests/456", "tags": ["patch"]}, {"url": "https://gitlab.ow2.org/asm/asm/-/commit/eb5fa95bb0670eaec2ecf9b8a3a501b48e5a967c", "tags": ["patch"]}, {"url": "https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassReader.java#L3497", "tags": ["technical-description"]}, {"url": "https://asm.ow2.io/versions.html", "tags": ["release-notes"], "name": "ASM 9.11 Release Notes"}, {"name": "VulnCheck Advisory: OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/ow2-asm-5.0-before-9.11-excessive-memory-allocation-via-bootstrapmethods-attribute"}], "credits": [{"lang": "en", "value": "Yu Bao, PayPal Cyber Security Team", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-14T14:49:40.338728Z", "id": "CVE-2026-110257", "options": [{"Exploitation": "none"}, {"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": "2026-10-14T15:55:22.107Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-110257", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-14T14:49:40.338728Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-14T14:49:41.341Z"}}], "cna": {"title": "OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute", "credits": [{"lang": "en", "type": "finder", "value": "Yu Bao, PayPal Cyber Security Team"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "baseScore": 6.8, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE"}}, {"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"repo": "https://gitlab.ow2.org/asm/asm", "vendor": "OW2", "product": "ASM", "versions": [{"status": "affected", "version": "5.0", "lessThan": "9.11", "versionType": "custom"}], "packageURL": "pkg:maven/org.ow2.asm/asm", "collectionURL": "https://repo1.maven.org/maven2/", "defaultStatus": "unaffected"}], "datePublic": "2026-08-13T00:00:00.000Z", "references": [{"url": "https://gitlab.ow2.org/asm/asm/-/merge_requests/456", "tags": ["patch"]}, {"url": "https://gitlab.ow2.org/asm/asm/-/commit/eb5fa95bb0670eaec2ecf9b8a3a501b48e5a967c", "tags": ["patch"]}, {"url": "https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassReader.java#L3497", "tags": ["technical-description"]}, {"url": "https://asm.ow2.io/versions.html", "name": "ASM 9.11 Release Notes", "tags": ["release-notes"]}, {"url": "https://www.vulncheck.com/advisories/ow2-asm-5.0-before-9.11-excessive-memory-allocation-via-bootstrapmethods-attribute", "name": "VulnCheck Advisory: OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute", "tags": ["third-party-advisory"]}], "x_generator": {"engine": "vulncheck-endgame"}, "descriptions": [{"lang": "en", "value": "OW2 ASM 5.0 before 9.11 contains an excessive memory allocation vulnerability in ClassReader.readBootstrapMethodsAttribute() that sizes an int array from num_bootstrap_methods without validating attribute_length. Attackers can supply a crafted class file of about 100 bytes that forces roughly 2 GB allocation, causing an OutOfMemoryError that crashes the JVM or consuming thread."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-789", "description": "Memory Allocation with Excessive Size Value"}]}], "providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-14T14:16:30.933Z"}}}, "cveMetadata": {"cveId": "CVE-2026-110257", "state": "PUBLISHED", "dateUpdated": "2026-10-14T15:55:22.107Z", "dateReserved": "2026-10-13T18:33:55.549Z", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "datePublished": "2026-10-14T14:16:30.933Z", "assignerShortName": "VulnCheck"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://repo1.maven.org/maven2/", "defaultStatus": "unaffected", "packageURL": "pkg:maven/org.ow2.asm/asm", "product": "ASM", "repo": "https://gitlab.ow2.org/asm/asm", "vendor": "OW2", "versions": [{"lessThan": "9.11", "status": "affected", "version": "5.0", "versionType": "custom"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OW2 ASM 5.0 before 9.11 contains an excessive memory allocation vulnerability in ClassReader.readBootstrapMethodsAttribute() that sizes an int array from num_bootstrap_methods without validating attribute_length. Attackers can supply a crafted class file of about 100 bytes that forces roughly 2 GB allocation, causing an OutOfMemoryError that crashes the JVM or consuming thread."}], "id": "CVE-2026-110257", "lastModified": "2026-10-14T16:17:41.060", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-110257", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-14T14:49:40.338728Z", "version": "2.0.3"}}]}, "published": "2026-10-14T15:17:07.350", "references": [{"source": "disclosure@vulncheck.com", "url": "https://asm.ow2.io/versions.html"}, {"source": "disclosure@vulncheck.com", "url": "https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassReader.java#L3497"}, {"source": "disclosure@vulncheck.com", "url": "https://gitlab.ow2.org/asm/asm/-/commit/eb5fa95bb0670eaec2ecf9b8a3a501b48e5a967c"}, {"source": "disclosure@vulncheck.com", "url": "https://gitlab.ow2.org/asm/asm/-/merge_requests/456"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/ow2-asm-5.0-before-9.11-excessive-memory-allocation-via-bootstrapmethods-attribute"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{"bugzilla": {"description": "org.ow2.asm/asm: OW2 ASM: Denial of Service via excessive memory allocation", "id": "2552305", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2552305"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["OW2 ASM 5.0 before 9.11 contains an excessive memory allocation vulnerability in ClassReader.readBootstrapMethodsAttribute() that sizes an int array from num_bootstrap_methods without validating attribute_length. Attackers can supply a crafted class file of about 100 bytes that forces roughly 2 GB allocation, causing an OutOfMemoryError that crashes the JVM or consuming thread.", "A flaw was found in OW2 ASM. An attacker can cause a Denial of Service (DoS) by providing a specially crafted Java class file. Due to missing attribute length validation during class parsing, processing the file triggers excessive memory allocation, exhausting system resources and crashing the application or the Java Virtual Machine (JVM)."], "name": "CVE-2026-110257", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "maven3.9", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-14T14:16:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-110257\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-110257\nhttps://asm.ow2.io/versions.html\nhttps://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassReader.java#L3497\nhttps://gitlab.ow2.org/asm/asm/-/commit/eb5fa95bb0670eaec2ecf9b8a3a501b48e5a967c\nhttps://gitlab.ow2.org/asm/asm/-/merge_requests/456\nhttps://www.vulncheck.com/advisories/ow2-asm-5.0-before-9.11-excessive-memory-allocation-via-bootstrapmethods-attribute"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.0,9.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "ASM", "source": "cna", "vendor": "OW2"}, "product": "asm", "vendor": "ow2"}], "created": "2026-10-15T03:00:14.001946+00:00", "updated": "2026-10-19T13:09:00.379430+00:00", "vendors": ["ow2", "ow2$PRODUCT$asm"]}