{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34380 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-34380 is a medium-severity vulnerability in Openexr Openexr, published on 6 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-34380 and fix it if it is affected.\n\nWhat it is: CVE-2026-34380 is a medium-severity vulnerability in Openexr Openexr, published on 6 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34380 exists.\n\nAffected product: Openexr Openexr. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-34380/ (Markdown: https://insights.sbomify.com/CVE-2026-34380/index.md)","id":"CVE-2026-34380","markdown":"https://insights.sbomify.com/CVE-2026-34380/index.md","name":"CVE-2026-34380","record":{"aliases":["BELL-CVE-2026-34380","DEBIAN-CVE-2026-34380","GHSA-q3v8-hw4m-59w5","JLSEC-2026-144","ROOT-OS-DEBIAN-11-CVE-2026-34380","ROOT-OS-DEBIAN-12-CVE-2026-34380","ROOT-OS-DEBIAN-13-CVE-2026-34380","UBUNTU-CVE-2026-34380"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenEXR image library","requires_auth":"none","summary":"A signed integer overflow in OpenEXR's PXR24 decompression can bypass bounds checks, leading to out-of-bounds writes and potential code execution.","user_interaction":"required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"openexr","vendor":"openexr"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, a signed integer overflow exists in undo_pxr24_impl() in src/lib/OpenEXRCore/internal_pxr24.c at line 377. The expression (uint64_t)(w * 3) computes w * 3 as a signed 32-bit integer before casting to uint64_t. When w is large, this multiplication constitutes undefined behavior under the C standard. On tested builds (clang/gcc without sanitizers), two's-complement wraparound commonly occurs, and for specific values of w the wrapped result is a small positive integer, which may allow the subsequent bounds check to pass incorrectly. If the check is bypassed, the decoding loop proceeds to write pixel data through dout, potentially extending far beyond the allocated output buffer. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Integer overflow in openexr","id":"CVE-2026-34380","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"openexr:openexr","products":["openexr:openexr"],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Admidio: Unauthenticated Access to Role-Restricted documents via neutralized .htaccess","id":"CVE-2026-34381"},"packages":[],"prev":{"headline":"OpenEXR has a misaligned write in LossyDctDecoder_execute leading to undefined behavior (DWA/DWAB decompression)","id":"CVE-2026-34379"},"products":["openexr"],"published":"2026-04-06","related":[{"cvss_score":9.1,"headline":"OpenEXR Heap Overflow in Scanline Deep Data Parsing","id":"CVE-2023-5841","kev_date_added":null,"published":"2024-02-01"},{"cvss_score":8.8,"headline":"OpenEXR is Vulnerable to Integer overflow in ImageChannel::resize leads to heap OOB write via OpenEXRUtil public API","id":"CVE-2026-41142","kev_date_added":null,"published":"2026-05-07"},{"cvss_score":8.8,"headline":"OpenEXR: Out-of-bounds read in `IDManifest::init()` during prefix expansion","id":"CVE-2026-42216","kev_date_added":null,"published":"2026-05-07"},{"cvss_score":8.8,"headline":"OpenEXR invalid write","id":"CVE-2017-9111","kev_date_added":null,"published":"2017-05-21"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2017-9113","kev_date_added":null,"published":"2017-05-21"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2017-9115","kev_date_added":null,"published":"2017-05-21"},{"cvss_score":8.7,"headline":"OpenEXR: Heap information disclosure in PXR24 decompression via unchecked decompressed size (undo_pxr24_impl)","id":"CVE-2026-34543","kev_date_added":null,"published":"2026-04-01"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-12","vendors":["AcademySoftwareFoundation"]},"summary":"A signed integer overflow in OpenEXR's PXR24 decompression can bypass bounds checks, leading to out-of-bounds writes and potential code execution.","url":"https://insights.sbomify.com/CVE-2026-34380/"}