{"api_version":"1","generated_at":"2026-04-17T12:04:57+00:00","cve":"CVE-2023-36464","urls":{"html":"https://cve.report/CVE-2023-36464","api":"https://cve.report/api/cve/CVE-2023-36464.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-36464","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-36464"},"summary":{"title":"CVE-2023-36464","description":"pypdf is an open source, pure-python PDF library. In affected versions an attacker may craft a PDF which leads to an infinite loop if `__parse_content_stream` is executed. That is, for example, the case if the user extracted text from such a PDF. This issue was introduced in pull request #969 and resolved in pull request #1828. Users are advised to upgrade. Users unable to upgrade may modify the line `while peek not in (b\"\\r\", b\"\\n\")` in `pypdf/generic/_data_structures.py` to `while peek not in (b\"\\r\", b\"\\n\", b\"\")`.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-06-27 22:15:00","updated_at":"2023-07-06 16:13:00"},"problem_types":["CWE-835"],"metrics":[],"references":[{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8","name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8","refsource":"MISC","tags":[],"title":"Possible Infinite Loop when a comment isn't followed by a character · Advisory · py-pdf/pypdf · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/py-pdf/pypdf/pull/1828","name":"https://github.com/py-pdf/pypdf/pull/1828","refsource":"MISC","tags":[],"title":"BUG: Prevent infinite loop when no character follows after a comment by exiledkingcc · Pull Request #1828 · py-pdf/pypdf · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/py-pdf/pypdf/pull/969","name":"https://github.com/py-pdf/pypdf/pull/969","refsource":"MISC","tags":[],"title":"improved ExtractText(3) by pubpub-zz · Pull Request #969 · py-pdf/pypdf · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-36464","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36464","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"36464","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"pypdf2_project","cpe5":"pypdf2","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"36464","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"pypdf_project","cpe5":"pypdf","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-36464","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"pypdf is an open source, pure-python PDF library. 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