{"answers":{"affected":"4 open source packages ship an affected version, including pillow. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-112396 in the wild and no public exploit code.","fix":"Upgrade pillow to 13.0.0 or later.","what":"CVE-2026-112396 is a medium-severity use after free vulnerability in Python Pillow, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-112396 and fix it if it is affected.\n\nWhat it is: CVE-2026-112396 is a medium-severity use after free vulnerability in Python Pillow, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-112396 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- pillow (Bitnami): affected from 11.3.0; fixed in 13.0.0\n- pillow (PyPI): affected from 11.3.0; fixed in 13.0.0\n- pillow (PyPI): affected from 11.3.0; fixed in 13.0.0\n- pillow (PyPI): affected from 11.3.0; fixed in 13.0.0\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-2026-112396/ (Markdown: https://insights.sbomify.com/CVE-2026-112396/index.md)","id":"CVE-2026-112396","markdown":"https://insights.sbomify.com/CVE-2026-112396/index.md","name":"CVE-2026-112396","record":{"aliases":["BIT-pillow-2026-112396","DEBIAN-CVE-2026-112396","ECHO-a3cb-3fc2-be43","GHSA-4rr5-89j8-mwwm","PYSEC-2026-4328","UBUNTU-CVE-2026-112396"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python imaging library","requires_auth":"none","summary":"A heap use-after-free in Pillow allows attackers to crash the process or potentially execute code by saving malicious TIFF tags to an in-memory buffer.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"pillow","vendor":"python"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"Pillow is a Python imaging library. From 11.3.0 until 13.0.0, Pillow has a heap use-after-free when libtiff rejects a tag while encoding TIFF data to an in-memory buffer. When an application saves attacker-influenced TIFF tags to BytesIO, libtiff can reject a tag during encoding in ImagingLibTiffEncode; the error path then frees the output buffer without closing or clearing the TIFF handle, and later cleanup flushes through the write callback into freed memory, which can crash the process and may enable code execution. This issue is fixed in version 13.0.0.","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 use-after-free when encoding TIFF to an in-memory buffer","id":"CVE-2026-112396","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"python:pillow","products":["python:pillow"],"type":"use_after_free","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Pillow: Out-of-bounds access in _imagingmorph on a zero-width image","id":"CVE-2026-112397"},"packages":[{"ecosystem":"Bitnami","fixed":["13.0.0"],"introduced":["11.3.0"],"last_affected":[],"package":"pillow","purl":"pkg:bitnami/pillow","source":"BIT-pillow-2026-112396"},{"ecosystem":"PyPI","fixed":["13.0.0"],"introduced":["11.3.0"],"last_affected":[],"package":"pillow","purl":null,"source":"GHSA-4rr5-89j8-mwwm"},{"ecosystem":"PyPI","fixed":["13.0.0"],"introduced":["11.3.0"],"last_affected":[],"package":"pillow","purl":"pkg:pypi/pillow","source":"GHSA-4rr5-89j8-mwwm"},{"ecosystem":"PyPI","fixed":["13.0.0"],"introduced":["11.3.0"],"last_affected":[],"package":"pillow","purl":"pkg:pypi/pillow","source":"PYSEC-2026-4328"}],"prev":{"headline":"Pillow tiled-TIFF decoder reads past tile buffer in copy4 (Unpack.c:1290)","id":"CVE-2026-112395"},"products":["Pillow"],"published":"2026-10-19","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":"2026-10-20","vendors":["python-pillow"]},"summary":"A heap use-after-free in Pillow allows attackers to crash the process or potentially execute code by saving malicious TIFF tags to an in-memory buffer.","url":"https://insights.sbomify.com/CVE-2026-112396/"}