{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-71870", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-07T18:26:53.524Z", "datePublished": "2026-08-07T19:28:26.178Z", "dateUpdated": "2026-08-07T19:28:26.178Z"}, "containers": {"cna": {"title": "pypdf: Possible large memory usage for large /ToUnicode streams", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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-fp3f-mc75-235c", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c"}, {"name": "https://github.com/py-pdf/pypdf/pull/3944", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/pull/3944"}, {"name": "https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa"}, {"name": "https://github.com/py-pdf/pypdf/releases/tag/6.15.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/releases/tag/6.15.0"}], "affected": [{"vendor": "py-pdf", "product": "pypdf", "versions": [{"version": "< 6.15.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-07T19:28:26.178Z"}, "descriptions": [{"lang": "en", "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0."}], "source": {"advisory": "GHSA-fp3f-mc75-235c", "discovery": "UNKNOWN"}}}}

{}

{}

{"bugzilla": {"description": "pypdf: pypdf: Denial of Service via crafted PDF with large /ToUnicode streams", "id": "2512627", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512627"}, "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": ["A flaw was found in pypdf, a pure-python PDF library. A remote attacker could exploit this vulnerability by providing a specially crafted PDF file. When the library attempts to parse unusually large font /ToUnicode CMap streams during text extraction, it can lead to excessive memory consumption. This can result in a denial of service (DoS) for applications processing such malicious PDF files."], "name": "CVE-2026-71870", "public_date": "2026-08-07T19:28:26Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-71870\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-71870\nhttps://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa\nhttps://github.com/py-pdf/pypdf/pull/3944\nhttps://github.com/py-pdf/pypdf/releases/tag/6.15.0\nhttps://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.15.0)"}}], "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"}], "created": "2026-08-07T20:30:17.425691+00:00", "updated": "2026-08-08T01:30:03.150853+00:00", "vendors": ["py-pdf", "py-pdf$PRODUCT$pypdf"]}