{"answers":{"affected":"4 open source packages ship an affected version, including pillow. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-42309 in the wild and no public exploit code.","fix":"Upgrade pillow to 12.2.0 or later.","what":"CVE-2026-42309 is a medium-severity memory corruption vulnerability in Python Pillow, published on 9 May 2026. 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-2026-42309 and fix it if it is affected.\n\nWhat it is: CVE-2026-42309 is a medium-severity memory corruption vulnerability in Python Pillow, published on 9 May 2026. 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-2026-42309 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- pillow (Bitnami): affected from 11.2.1; fixed in 12.2.0\n- pillow (PyPI): affected from 11.2.1; fixed in 12.2.0\n- pillow (PyPI): affected from 11.2.1; fixed in 12.2.0\n- pillow (PyPI): affected from 11.2.1; fixed in 12.2.0\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-2026-42309/ (Markdown: https://insights.sbomify.com/CVE-2026-42309/index.md)","id":"CVE-2026-42309","markdown":"https://insights.sbomify.com/CVE-2026-42309/index.md","name":"CVE-2026-42309","record":{"aliases":["BIT-pillow-2026-42309","CLEANSTART-2026-SE11924","CLEANSTART-2026-YG79254","CLSA-2026-1791446319","DEBIAN-CVE-2026-42309","ECHO-7eb6-969e-18b8","GHSA-5xmw-vc9v-4wf2","MINI-322r-mvvg-7g45","MINI-38wf-mq4m-5q2j","MINI-r225-qf6x-gcp9","MINI-xj4c-7rcr-p5vm","PYSEC-2026-2251","ROOT-APP-PYPI-CVE-2026-42309","UBUNTU-CVE-2026-42309"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Python imaging library","requires_auth":"none","summary":"Attackers can trigger heap buffer overflows in Pillow by passing nested lists to coordinate APIs, potentially leading to code execution or crashes.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"pillow","vendor":"python"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could cause a heap buffer overflow, as nested lists were recursively unpacked beyond the allocated buffer. Coordinate lists are now validated to contain exactly two numeric coordinates. This issue has been patched in version 12.2.0.","ecosystems":["Bitnami","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":"Pillow: Heap buffer overflow with nested list coordinates","id":"CVE-2026-42309","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"python:pillow","products":["python:pillow"],"type":"memory_corruption","year":"2026"},"n_packages":4,"n_references":2,"next":{"headline":"Pillow: PDF Parsing Trailer Infinite Loop (DoS)","id":"CVE-2026-42310"},"packages":[{"ecosystem":"Bitnami","fixed":["12.2.0"],"introduced":["11.2.1"],"last_affected":[],"package":"pillow","purl":"pkg:bitnami/pillow","source":"BIT-pillow-2026-42309"},{"ecosystem":"PyPI","fixed":["12.2.0"],"introduced":["11.2.1"],"last_affected":[],"package":"pillow","purl":null,"source":"GHSA-5xmw-vc9v-4wf2"},{"ecosystem":"PyPI","fixed":["12.2.0"],"introduced":["11.2.1"],"last_affected":[],"package":"pillow","purl":"pkg:pypi/pillow","source":"GHSA-5xmw-vc9v-4wf2"},{"ecosystem":"PyPI","fixed":["12.2.0"],"introduced":["11.2.1"],"last_affected":[],"package":"pillow","purl":"pkg:pypi/pillow","source":"PYSEC-2026-2251"}],"prev":{"headline":"Pillow: Integer overflow when processing fonts","id":"CVE-2026-42308"},"products":["Pillow"],"published":"2026-05-09","related":[{"cvss_score":10,"headline":"Pillow command injection","id":"CVE-2014-3007","kev_date_added":null,"published":"2014-04-27"},{"cvss_score":9.8,"headline":"Pillow multi-frame loaders can reuse stale native image storage after mode transitions","id":"CVE-2026-96639","kev_date_added":null,"published":"2026-10-21"},{"cvss_score":9.8,"headline":"Buffer over-flow in Pillow","id":"CVE-2022-30595","kev_date_added":null,"published":"2022-05-25"},{"cvss_score":9.8,"headline":"Out of bounds write in Pillow","id":"CVE-2021-25289","kev_date_added":null,"published":"2021-03-19"},{"cvss_score":9.8,"headline":"Pillow Integer overflow in ImagingResampleHorizontal","id":"CVE-2016-4009","kev_date_added":null,"published":"2016-04-13"},{"cvss_score":9.2,"headline":"Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO","id":"CVE-2026-112393","kev_date_added":null,"published":"2026-10-19"},{"cvss_score":9.2,"headline":"Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution","id":"CVE-2026-112398","kev_date_added":null,"published":"2026-10-19"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"2026-05-11","vendors":["python-pillow"]},"summary":"Attackers can trigger heap buffer overflows in Pillow by passing nested lists to coordinate APIs, potentially leading to code execution or crashes.","url":"https://insights.sbomify.com/CVE-2026-42309/"}