{"answers":{"affected":"3 open source packages ship an affected version, including pypdf2 and PyPDF2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-36810 in the wild and no public exploit code.","fix":"Upgrade pypdf2 to 1.27.9 or later.","what":"CVE-2023-36810 is a medium-severity denial of service vulnerability in Pypdf Project Pypdf, published on 30 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-36810 and fix it if it is affected.\n\nWhat it is: CVE-2023-36810 is a medium-severity denial of service vulnerability in Pypdf Project Pypdf, published on 30 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-36810 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- pypdf2 (PyPI): affected all versions; fixed in 1.27.9\n- pypdf2 (PyPI): affected all versions; fixed in 1.27.9\n- PyPDF2 (PyPI): affected all versions; fixed in 1.27.9\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-36810/ (Markdown: https://insights.sbomify.com/CVE-2023-36810/index.md)","id":"CVE-2023-36810","markdown":"https://insights.sbomify.com/CVE-2023-36810/index.md","name":"CVE-2023-36810","record":{"aliases":["DEBIAN-CVE-2023-36810","DLA-3497-1","GHSA-jrm6-h9cq-8gqw","MGASA-2023-0254","PYSEC-2026-1837","UBUNTU-CVE-2023-36810","USN-6280-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Python PDF library","requires_auth":"none","summary":"An attacker can cause a denial of service by crafting a malformed PDF that triggers quadratic runtime in the pypdf library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"pypdf","vendor":"pypdf_project"}],"cvss":{"score":6.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"}],"description":"pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. This issue has been addressed in PR 808 and versions from 1.27.9 include this fix. Users are advised to upgrade. There are no known workarounds for this vulnerability.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Quadratic runtime with malformed PDF missing xref marker in pypdf","id":"CVE-2023-36810","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"pypdf_project:pypdf","products":["pypdf_project:pypdf"],"type":"denial_of_service","year":"2023"},"n_packages":3,"n_references":4,"next":{"headline":"Archive spoofing vulnerability in borgbackup","id":"CVE-2023-36811"},"packages":[{"ecosystem":"PyPI","fixed":["1.27.9"],"introduced":["0"],"last_affected":[],"package":"PyPDF2","purl":null,"source":"GHSA-jrm6-h9cq-8gqw"},{"ecosystem":"PyPI","fixed":["1.27.9"],"introduced":["0"],"last_affected":[],"package":"pypdf2","purl":"pkg:pypi/pypdf2","source":"GHSA-jrm6-h9cq-8gqw"},{"ecosystem":"PyPI","fixed":["1.27.9"],"introduced":["0"],"last_affected":[],"package":"pypdf2","purl":"pkg:pypi/pypdf2","source":"PYSEC-2026-1837"}],"prev":{"headline":"Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox","id":"CVE-2023-36809"},"products":["pypdf"],"published":"2023-06-30","related":[{"cvss_score":8.7,"headline":"pypdf: Possible large memory usage when retrieving Roman page labels","id":"CVE-2026-102993","kev_date_added":null,"published":"2026-09-30"},{"cvss_score":8.7,"headline":"pypdf: Possible long runtimes/large memory usage when parsing indirect objects","id":"CVE-2026-102994","kev_date_added":null,"published":"2026-09-30"},{"cvss_score":8.7,"headline":"pypdf: Possible large memory usage for large /ToUnicode streams (Follow-up 2)","id":"CVE-2026-102995","kev_date_added":null,"published":"2026-09-30"},{"cvss_score":8.7,"headline":"pypdf: Possible large memory usage when parsing font data","id":"CVE-2026-102996","kev_date_added":null,"published":"2026-09-30"},{"cvss_score":8.7,"headline":"pypdf: Possible long runtimes for partially malformed FlateDecode streams (Follow-up)","id":"CVE-2026-102997","kev_date_added":null,"published":"2026-09-30"},{"cvss_score":8.7,"headline":"pypdf: Possible long runtimes when generating appearance streams","id":"CVE-2026-102998","kev_date_added":null,"published":"2026-09-30"},{"cvss_score":8.7,"headline":"pypdf: Possible long runtimes with large amount of embedded files","id":"CVE-2026-102999","kev_date_added":null,"published":"2026-09-30"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-02-13","vendors":["py-pdf"]},"summary":"An attacker can cause a denial of service by crafting a malformed PDF that triggers quadratic runtime in the pypdf library.","url":"https://insights.sbomify.com/CVE-2023-36810/"}