{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40260", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-10T17:31:45.787Z", "datePublished": "2026-04-16T23:18:26.687Z", "dateUpdated": "2026-04-16T23:18:26.687Z"}, "containers": {"cna": {"title": "pypdf: Manipulated XMP metadata entity declarations can exhaust RAM", "problemTypes": [{"descriptions": [{"cweId": "CWE-776", "lang": "en", "description": "CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx"}, {"name": "https://github.com/py-pdf/pypdf/pull/3724", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/pull/3724"}, {"name": "https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8"}, {"name": "https://github.com/py-pdf/pypdf/releases/tag/6.10.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/releases/tag/6.10.0"}], "affected": [{"vendor": "py-pdf", "product": "pypdf", "versions": [{"version": "< 6.10.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-16T23:18:26.687Z"}, "descriptions": [{"lang": "en", "value": "pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0."}], "source": {"advisory": "GHSA-3crg-w4f6-42mx", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0."}], "id": "CVE-2026-40260", "lastModified": "2026-04-17T01:17:39.733", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "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": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-17T01:17:39.733", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8"}, {"source": "security-advisories@github.com", "url": "https://github.com/py-pdf/pypdf/pull/3724"}, {"source": "security-advisories@github.com", "url": "https://github.com/py-pdf/pypdf/releases/tag/6.10.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-776"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.10.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "pypdf", "source": "cna", "vendor": "py-pdf"}, "product": "pypdf", "vendor": "py-pdf"}], "analysis": {"en": {"generated_at": "2026-04-17T02:21:17.735799+00:00", "value": {"mitigation_remediation": ["Upgrade to pypdf version 6.10.0 or later as the vulnerability has been fixed.", "If a library upgrade cannot be performed immediately, run PDF parsing in a sandboxed or isolated process and enforce strict memory limits to contain potential exhaustion.", "Pre\u2011validate or sanitize PDFs to limit XMP metadata complexity before delegating to pypdf, rejecting documents that exceed reasonable size thresholds."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service via memory exhaustion"}, "threat_synthesis": {"affected_systems": "The vulnerability affects all installations of the py-pdf:pypdf library with a version prior to 6.10.0. Any system that processes PDF documents using this library is potentially exposed.", "description_and_impact": "Manipulated XMP metadata entity declarations in the pypdf library cause the PDF parsing process to allocate large amounts of memory, leading to resource exhaustion. The vulnerability is an instance of improper resource management (CWE-776) and can produce a denial\u2011of\u2011service condition if an attacker feeds a malicious PDF file to a system that imports it with this library.", "risk_and_exploitability": "The CVSS score of 6.9 indicates moderate severity. No EPSS score is available, and the issue is not listed in the CISA KEV catalog. The attack requires only the ability to supply a corrupted PDF to the application; thus, services that accept user\u2011supplied PDF files or libraries that process PDFs on the internet are the most likely vectors. If exploited, the victim may experience high memory consumption and possible crash or suspension of the process, impacting availability of the application."}}}}, "created": "2026-04-17T01:00:05.626231+00:00", "updated": "2026-04-17T02:30:07.311128+00:00", "vendors": ["py-pdf", "py-pdf$PRODUCT$pypdf"]}